🕷️ Crawler Inspector

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Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 35 (from laksa077)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa035.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.programiz.com/python-programming/exception-handling\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.programiz.com/python-programming/exception-handling\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.programiz.com\/python-programming\/exception-handling","crawl_time":1776304909,"first_indexed_time":1479942755,"http_code":200,"src_unparsed":"com,programiz!www,\/python-programming\/exception-handling s443","src_root_hash":"16786490165506891835","history_drop_reason":null,"meta_title":"Python Exception Handling (With Examples)","meta_descriptions":["In the tutorial, we will learn about different approaches of exception handling in Python with the help of examples."],"attrs_boilerpipe_text":"In the last tutorial, we learned about\nPython exceptions\n. We know that exceptions abnormally terminate the execution of a program.\nSince exceptions abnormally terminate the execution of a program, it is important to handle exceptions. In Python, we use the\ntry...except\nblock to handle exceptions.\nPython try...except Block\nThe\ntry...except\nblock is used to handle exceptions in Python. Here's the syntax of\ntry...except\nblock:\ntry:\n    # code that may cause exception\nexcept:\n    # code to run when exception occurs\nHere, we have placed the code that might generate an exception inside the\ntry\nblock. Every\ntry\nblock is followed by an\nexcept\nblock.\nWhen an exception occurs, it is caught by the\nexcept\nblock. The\nexcept\nblock cannot be used without the try block.\nExample: Exception Handling Using try...except\ntry:\n    numerator = 10\n    denominator = 0\n\n    result = numerator\/denominator\n\n    print(result)\nexcept:\n    print(\"Error: Denominator cannot be 0.\")\n\n# Output: Error: Denominator cannot be 0.\nIn the example, we are trying to divide a number by\n0\n. Here, this code generates an exception.\nTo handle the exception, we have put the code,\nresult = numerator\/denominator\ninside the\ntry\nblock. Now when an exception occurs, the rest of the code inside the\ntry\nblock is skipped.\nThe\nexcept\nblock catches the exception and statements inside the\nexcept\nblock are executed.\nIf none of the statements in the\ntry\nblock generates an exception, the\nexcept\nblock is skipped.\nCatching Specific Exceptions in Python\nFor each\ntry\nblock, there can be zero or more\nexcept\nblocks. Multiple\nexcept\nblocks allow us to handle each exception differently.\nThe argument type of each\nexcept\nblock indicates the type of exception that can be handled by it. For example,\ntry:\n    \n    even_numbers = [2,4,6,8]\n    print(even_numbers[5])\n\nexcept ZeroDivisionError:\n    print(\"Denominator cannot be 0.\")\n    \nexcept IndexError:\n    print(\"Index Out of Bound.\")\n\n# Output: Index Out of Bound\nIn this example, we have created a\nlist\nnamed\neven_numbers\n.\nSince the list index starts from\n0\n, the last element of the list is at index\n3\n. Notice the statement,\nprint(even_numbers[5])\nHere, we are trying to access a value to the index\n5\n. Hence,\nIndexError\nexception occurs.\nWhen the\nIndexError\nexception occurs in the\ntry\nblock,\nThe\nZeroDivisionError\nexception is skipped.\nThe set of code inside the\nIndexError\nexception is executed.\nPython try with else clause\nIn some situations, we might want to run a certain block of code if the code block inside\ntry\nruns without any errors.\nFor these cases, you can use the optional\nelse\nkeyword with the\ntry\nstatement.\nLet's look at an example:\n# program to print the reciprocal of even numbers\n\ntry:\n    num = int(input(\"Enter a number: \"))\n    assert num % 2 == 0\nexcept:\n    print(\"Not an even number!\")\nelse:\n    reciprocal = 1\/num\n    print(reciprocal)\nOutput\nIf we pass an odd number:\nEnter a number: 1\nNot an even number!\nIf we pass an even number, the reciprocal is computed and displayed.\nEnter a number: 4\n0.25\nHowever, if we pass\n0\n, we get\nZeroDivisionError\nas the code block inside\nelse\nis not handled by preceding\nexcept\n.\nEnter a number: 0\nTraceback (most recent call last):\n  File \"<string>\", line 7, in <module>\n    reciprocal = 1\/num\nZeroDivisionError: division by zero\nHere, the\nassert\nstatement in the code checks that\nnum\nis an even number; if num is odd, it raises an\nAssertionError\n, triggering the except block.\nNote\n: Exceptions in the\nelse\nclause are not handled by the preceding except clauses.\nPython try...finally\nIn Python, the\nfinally\nblock is always executed no matter whether there is an exception or not.\nThe\nfinally\nblock is optional. And, for each\ntry\nblock, there can be only one\nfinally\nblock.\nLet's see an example,\ntry:\n    numerator = 10\n    denominator = 0\n\n    result = numerator\/denominator\n\n    print(result)\nexcept:\n    print(\"Error: Denominator cannot be 0.\")\n    \nfinally:\n    print(\"This is finally block.\")\nOutput\nError: Denominator cannot be 0.\nThis is finally block.\nIn the above example, we are dividing a number by\n0\ninside the\ntry\nblock. Here, this code generates an exception.\nThe exception is caught by the\nexcept\nblock. And, then the\nfinally\nblock is executed.\nAlso Read:\nPython built-in Exception\nPython user-defined Exception","attrs_markdown":"![](https:\/\/www.facebook.com\/tr?id=123000288571689&ev=PageView&noscript=1)\n\n[Stop copy pasting code you don't actually understand Build the coding confidence you need to become a developer companies will fight for Stop copy pasting code you don't actually understand Ends in Start FREE Trial Start FREE Trial Start FREE Trial Start FREE Trial](https:\/\/programiz.pro\/?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=programiz&utm_content=default_banner&utm_term=sticky_banner_launch \"Start FREE Trial\")\n\n[Stop copy pasting code you don't actually understand Build the coding confidence you need to become a developer companies will fight for Stop copy pasting code you don't actually understand Ends in Start FREE Trial Start FREE Trial Start FREE Trial Start FREE 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C](https:\/\/programiz.pro\/learn\/master-c-programming?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=challenge_promotion&utm_content=interests_learn_c&utm_term=nav_programiz-pro_challenges \"Learn C\")\n\n[Learn C++](https:\/\/programiz.pro\/learn\/master-cpp?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=challenge_promotion&utm_content=interests_learn_cpp&utm_term=nav_programiz-pro_challenges \"Learn C++\")\n\n[Learn Java](https:\/\/programiz.pro\/learn\/master-java?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=challenge_promotion&utm_content=interests_learn_java&utm_term=nav_programiz-pro_challenges \"Learn Java\")\n\n[Python](\"Python\")\n\n[JavaScript](\"JavaScript\")\n\n[TypeScript](\"TypeScript\")\n\n[SQL](\"SQL\")\n\n[HTML](\"HTML\")\n\n[CSS](\"CSS\")\n\n[C](\"C\")\n\n[C++](\"C++\")\n\n[Java](\"Java\")\n\n[More languages](\"More languages\")\n\n### Become a certified Python  programmer.\n[Try Programiz PRO\\!](https:\/\/programiz.pro\/learn\/master-python?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner)\n\n#### Popular Tutorials\n[Getting Started With Python](https:\/\/www.programiz.com\/python-programming\/getting-started?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner \"Getting Started With Python\")\n\n[Python if Statement](https:\/\/www.programiz.com\/python-programming\/if-elif-else?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner \"Python if Statement\")\n\n[while Loop in Python](https:\/\/www.programiz.com\/python-programming\/while-loop?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner \"while Loop in Python\")\n\n[Python Lists](https:\/\/www.programiz.com\/python-programming\/list?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner \"Python Lists\")\n\n[Dictionaries in Python](https:\/\/www.programiz.com\/python-programming\/dictionary?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner \"Dictionaries in Python\")\n\n[Start Learning Python](https:\/\/www.programiz.com\/python-programming?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner \"Python tutorials\")\n\n[All Python Tutorials](https:\/\/www.programiz.com\/python-programming?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner \"All Python tutorials\")\n\n#### Reference Materials\n[Built-in Functions](https:\/\/www.programiz.com\/python-programming\/methods\/built-in?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner \"Built-in Functions\")\n\n[List Methods](https:\/\/www.programiz.com\/python-programming\/methods\/list?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner \"List Methods\")\n\n[Dictionary Methods](https:\/\/www.programiz.com\/python-programming\/methods\/dictionary?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner \"Dictionary Methods\")\n\n[String Methods](https:\/\/www.programiz.com\/python-programming\/methods\/string?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner \"String Methods\")\n\n[View all](https:\/\/www.programiz.com\/python-programming\/methods?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner \"Python References\")\n\n[Python](\"Python\")\n\n[JavaScript](\"JavaScript\")\n\n[C](\"C\")\n\n[C++](\"C++\")\n\n[Java](\"Java\")\n\n[R](\"R\")\n\n[Kotlin](\"Kotlin\")\n\nBecome a certified Python   \nprogrammer.\n\n[Try Programiz PRO\\!](https:\/\/programiz.pro\/learn\/master-python?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner)\n\n#### Popular Examples\n[Add two numbers](https:\/\/www.programiz.com\/python-programming\/examples\/add-number?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner \"Add two numbers\")\n\n[Check prime number](https:\/\/www.programiz.com\/python-programming\/examples\/prime-number?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner \"Check prime number\")\n\n[Find the factorial of a number](https:\/\/www.programiz.com\/python-programming\/examples\/factorial?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner \"Find the factorial of a number\")\n\n[Print the Fibonacci sequence](https:\/\/www.programiz.com\/python-programming\/examples\/fibonacci-sequence?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner \"Print the Fibonacci sequence\")\n\n[Check leap year](https:\/\/www.programiz.com\/python-programming\/examples\/leap-year?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner \"Check leap year\")\n\n[All Python Examples](https:\/\/www.programiz.com\/python-programming\/examples?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner \"Python Examples\")\n\n- ### Python Introduction\n  - [Get Started With Python](https:\/\/www.programiz.com\/python-programming\/getting-started \"Get Started With Python\")\n  - [Your First Python Program](https:\/\/www.programiz.com\/python-programming\/first-program \"Your First Python Program\")\n  - [Python Comments](https:\/\/www.programiz.com\/python-programming\/comments \"Python Comments\")\n- ### Python Fundamentals\n  - [Python Variables and Literals](https:\/\/www.programiz.com\/python-programming\/variables-constants-literals \"Python Variables and Literals\")\n  - [Python Type Conversion](https:\/\/www.programiz.com\/python-programming\/type-conversion-and-casting \"Python Type Conversion\")\n  - [Python Basic Input and Output](https:\/\/www.programiz.com\/python-programming\/input-output-import \"Python Basic Input and Output\")\n  - [Python Operators](https:\/\/www.programiz.com\/python-programming\/operators \"Python Operators\")\n- ### Python Flow Control\n  - [Python if...else Statement](https:\/\/www.programiz.com\/python-programming\/if-elif-else \"Python if...else Statement\")\n  - [Python for Loop](https:\/\/www.programiz.com\/python-programming\/for-loop \"Python for\n    Loop\")\n  - [Python while Loop](https:\/\/www.programiz.com\/python-programming\/while-loop \"Python\n    while Loop\")\n  - [Python break and continue](https:\/\/www.programiz.com\/python-programming\/break-continue \"Python break and continue\")\n  - [Python pass Statement](https:\/\/www.programiz.com\/python-programming\/pass-statement \"Python pass Statement\")\n- ### Python Data types\n  - [Python Numbers and Mathematics](https:\/\/www.programiz.com\/python-programming\/numbers \"Python Numbers and Mathematics\")\n  - [Python List](https:\/\/www.programiz.com\/python-programming\/list \"Python List\")\n  - [Python Tuple](https:\/\/www.programiz.com\/python-programming\/tuple \"Python Tuple\")\n  - [Python String](https:\/\/www.programiz.com\/python-programming\/string \"Python String\")\n  - [Python Set](https:\/\/www.programiz.com\/python-programming\/set \"Python Set\")\n  - [Python Dictionary](https:\/\/www.programiz.com\/python-programming\/dictionary \"Python Dictionary\")\n- ### Python Functions\n  - [Python Functions](https:\/\/www.programiz.com\/python-programming\/function \"Python Functions\")\n  - [Python Function Arguments](https:\/\/www.programiz.com\/python-programming\/function-argument \"Python Function Arguments\")\n  - [Python Variable Scope](https:\/\/www.programiz.com\/python-programming\/global-local-nonlocal-variables \"Python Variable Scope\")\n  - [Python Global Keyword](https:\/\/www.programiz.com\/python-programming\/global-keyword \"Python Global Keyword\")\n  - [Python Recursion](https:\/\/www.programiz.com\/python-programming\/recursion \"Python Recursion\")\n  - [Python Modules](https:\/\/www.programiz.com\/python-programming\/modules \"Python Modules\")\n  - [Python Package](https:\/\/www.programiz.com\/python-programming\/package \"Python Package\")\n  - [Python Main function](https:\/\/www.programiz.com\/python-programming\/main-function \"Python Main function\")\n- ### Python Files\n  - [Python Directory and Files Management](https:\/\/www.programiz.com\/python-programming\/directory \"Python Directory and Files Management\")\n  - [Python CSV: Read and Write CSV files](https:\/\/www.programiz.com\/python-programming\/csv \"Python CSV: Read and Write CSV files\")\n  - [Reading CSV files in Python](https:\/\/www.programiz.com\/python-programming\/reading-csv-files \"Reading CSV files in Python\")\n  - [Writing CSV files in Python](https:\/\/www.programiz.com\/python-programming\/writing-csv-files \"Writing CSV files in Python\")\n- ### Python Exception Handling\n  - [Python Exceptions](https:\/\/www.programiz.com\/python-programming\/exceptions \"Python Exceptions\")\n  - [Python Exception Handling](https:\/\/www.programiz.com\/python-programming\/exception-handling \"Python Exception Handling\")\n  - [Python Custom Exceptions](https:\/\/www.programiz.com\/python-programming\/user-defined-exception \"Python Custom Exceptions\")\n- ### Python Object & Class\n  - [Python Objects and Classes](https:\/\/www.programiz.com\/python-programming\/class \"Python Objects and Classes\")\n  - [Python Inheritance](https:\/\/www.programiz.com\/python-programming\/inheritance \"Python\n    Inheritance\")\n  - [Python Multiple Inheritance](https:\/\/www.programiz.com\/python-programming\/multiple-inheritance \"Python Multiple Inheritance\")\n  - [Polymorphism in Python](https:\/\/www.programiz.com\/python-programming\/polymorphism \"Polymorphism in Python\")\n  - [Python Operator Overloading](https:\/\/www.programiz.com\/python-programming\/operator-overloading \"Python Operator Overloading\")\n- ### Python Advanced Topics\n  - [List comprehension](https:\/\/www.programiz.com\/python-programming\/list-comprehension \"List comprehension\")\n  - [Python Lambda\/Anonymous Function](https:\/\/www.programiz.com\/python-programming\/anonymous-function \"Python Lambda\/Anonymous Function\")\n  - [Python Iterators](https:\/\/www.programiz.com\/python-programming\/iterator \"Python Iterators\")\n  - [Python Generators](https:\/\/www.programiz.com\/python-programming\/generator \"Python Generators\")\n  - [Python Namespace and Scope](https:\/\/www.programiz.com\/python-programming\/namespace \"Python Namespace and Scope\")\n  - [Python Closures](https:\/\/www.programiz.com\/python-programming\/closure \"Python Closures\")\n  - [Python Decorators](https:\/\/www.programiz.com\/python-programming\/decorator \"Python Decorators\")\n  - [Python @property decorator](https:\/\/www.programiz.com\/python-programming\/property \"Python @property decorator\")\n  - [Python RegEx](https:\/\/www.programiz.com\/python-programming\/regex \"Python RegEx\")\n- ### Python Date and Time\n  - [Python datetime](https:\/\/www.programiz.com\/python-programming\/datetime \"Python\n    datetime\")\n  - [Python strftime()](https:\/\/www.programiz.com\/python-programming\/datetime\/strftime \"Python\n    strftime()\")\n  - [Python strptime()](https:\/\/www.programiz.com\/python-programming\/datetime\/strptime \"Python strptime()\")\n  - [How to get current date and time in Python?](https:\/\/www.programiz.com\/python-programming\/datetime\/current-datetime \"How to get current date and time in Python?\")\n  - [Python Get Current Time](https:\/\/www.programiz.com\/python-programming\/datetime\/current-time \"Python Get Current Time\")\n  - [Python timestamp to datetime and vice-versa](https:\/\/www.programiz.com\/python-programming\/datetime\/timestamp-datetime \"Python timestamp to datetime and vice-versa\")\n  - [Python time Module](https:\/\/www.programiz.com\/python-programming\/time \"Python time\n    Module\")\n  - [Python sleep()](https:\/\/www.programiz.com\/python-programming\/time\/sleep \"Python\n    sleep()\")\n- ### Additional Topic\n  - [Precedence and Associativity of Operators in Python](https:\/\/www.programiz.com\/python-programming\/precedence-associativity \"Precedence and Associativity of Operators in Python \")\n  - [Python Keywords and Identifiers](https:\/\/www.programiz.com\/python-programming\/keywords-identifier \"Python Keywords and Identifiers\")\n  - [Python Asserts](https:\/\/www.programiz.com\/python-programming\/assert-statement \"Python Asserts\")\n  - [Python Json](https:\/\/www.programiz.com\/python-programming\/json \"Python Json\")\n  - [Python pip](https:\/\/www.programiz.com\/python-programming\/pip \"Python pip\")\n  - [Python \\*args and \\*\\*kwargs](https:\/\/www.programiz.com\/python-programming\/args-and-kwargs \"Python *args and **kwargs \")\n\n### Python Tutorials\n- [Python Custom Exceptions](https:\/\/www.programiz.com\/python-programming\/user-defined-exception)\n- [Python Exceptions](https:\/\/www.programiz.com\/python-programming\/exceptions)\n- [List of Keywords in Python](https:\/\/www.programiz.com\/python-programming\/keyword-list)\n- [Python match…case Statement](https:\/\/www.programiz.com\/python-programming\/match-case)\n- [Python if...else Statement](https:\/\/www.programiz.com\/python-programming\/if-elif-else)\n- [Python String index()](https:\/\/www.programiz.com\/python-programming\/methods\/string\/index)\n\n[![](https:\/\/www.programiz.com\/sites\/tutorial2program\/files\/dsa-3.png)](https:\/\/programiz.pro\/dsa-with-visualizer?utm_source=programiz.com&utm_medium=referral&utm_campaign=dsa_with_visualizer_launch_2025&utm_content=interests_learn_dsa&utm_term=top-most-ad-spot-dsa-3)\n\n# Python Exception Handling\nIn the last tutorial, we learned about [Python exceptions](https:\/\/www.programiz.com\/python-programming\/exceptions). We know that exceptions abnormally terminate the execution of a program.\n\nSince exceptions abnormally terminate the execution of a program, it is important to handle exceptions. In Python, we use the `try...except` block to handle exceptions.\n***\n## Python try...except Block\nThe `try...except` block is used to handle exceptions in Python. Here's the syntax of `try...except` block:\n```\ntry:\n    # code that may cause exception\nexcept:\n    # code to run when exception occurs\n```\nHere, we have placed the code that might generate an exception inside the `try` block. Every `try` block is followed by an `except` block.\n\nWhen an exception occurs, it is caught by the `except` block. The `except` block cannot be used without the try block.\n***\n## Example: Exception Handling Using try...except\n```\ntry:\n    numerator = 10\n    denominator = 0\n\n    result = numerator\/denominator\n\n    print(result)\nexcept:\n    print(\"Error: Denominator cannot be 0.\")\n\n# Output: Error: Denominator cannot be 0.\n```\nIn the example, we are trying to divide a number by **0**. Here, this code generates an exception.\n\nTo handle the exception, we have put the code, `result = numerator\/denominator` inside the `try` block. Now when an exception occurs, the rest of the code inside the `try` block is skipped.\n\nThe `except` block catches the exception and statements inside the `except` block are executed.\n\nIf none of the statements in the `try` block generates an exception, the `except` block is skipped.\n***\n## Catching Specific Exceptions in Python\nFor each `try` block, there can be zero or more `except` blocks. Multiple `except` blocks allow us to handle each exception differently.\n\nThe argument type of each `except` block indicates the type of exception that can be handled by it. For example,\n```\ntry:\n    \n    even_numbers = [2,4,6,8]\n    print(even_numbers[5])\n\nexcept ZeroDivisionError:\n    print(\"Denominator cannot be 0.\")\n    \nexcept IndexError:\n    print(\"Index Out of Bound.\")\n\n# Output: Index Out of Bound\n```\nIn this example, we have created a [list](https:\/\/www.programiz.com\/python-programming\/list) named even\\_numbers.\n\nSince the list index starts from **0**, the last element of the list is at index **3**. Notice the statement,\n```\nprint(even_numbers[5])\n```\nHere, we are trying to access a value to the index **5**. Hence, `IndexError` exception occurs.\n\nWhen the `IndexError` exception occurs in the `try` block,\n\n- The `ZeroDivisionError` exception is skipped.\n- The set of code inside the `IndexError` exception is executed.\n***\n## Python try with else clause\nIn some situations, we might want to run a certain block of code if the code block inside `try` runs without any errors.\n\nFor these cases, you can use the optional `else` keyword with the `try` statement.\n\nLet's look at an example:\n```\n# program to print the reciprocal of even numbers\n\ntry:\n    num = int(input(\"Enter a number: \"))\n    assert num % 2 == 0\nexcept:\n    print(\"Not an even number!\")\nelse:\n    reciprocal = 1\/num\n    print(reciprocal)\n```\n**Output**\n\nIf we pass an odd number:\n```\nEnter a number: 1 Not an even number!\n```\nIf we pass an even number, the reciprocal is computed and displayed.\n```\nEnter a number: 4 0.25\n```\nHowever, if we pass **0**, we get `ZeroDivisionError` as the code block inside `else` is not handled by preceding `except`.\n```\nEnter a number: 0 Traceback (most recent call last): File \"<string>\", line 7, in <module> reciprocal = 1\/num ZeroDivisionError: division by zero\n```\nHere, the [assert](https:\/\/www.programiz.com\/python-programming\/assert-statement) statement in the code checks that `num` is an even number; if num is odd, it raises an `AssertionError`, triggering the except block.\n\n**Note**: Exceptions in the `else` clause are not handled by the preceding except clauses.\n***\n## Python try...finally\nIn Python, the `finally` block is always executed no matter whether there is an exception or not.\n\nThe `finally` block is optional. And, for each `try` block, there can be only one `finally` block.\n\nLet's see an example,\n```\ntry:\n    numerator = 10\n    denominator = 0\n\n    result = numerator\/denominator\n\n    print(result)\nexcept:\n    print(\"Error: Denominator cannot be 0.\")\n    \nfinally:\n    print(\"This is finally block.\")\n```\n**Output**\n```\nError: Denominator cannot be 0. This is finally block.\n```\nIn the above example, we are dividing a number by **0** inside the `try` block. Here, this code generates an exception.\n\nThe exception is caught by the `except` block. And, then the `finally` block is executed.\n***\n**Also Read:**\n\n- [Python built-in Exception](https:\/\/www.programiz.com\/python-programming\/exceptions)\n- [Python user-defined Exception](https:\/\/www.programiz.com\/python-programming\/user-defined-exception)\n\n### Table of Contents\n- [Introduction](https:\/\/www.programiz.com\/python-programming\/exception-handling#introduction)\n- [Python try...except Block](https:\/\/www.programiz.com\/python-programming\/exception-handling#try-except)\n- [Catching Specific Exceptions in Python](https:\/\/www.programiz.com\/python-programming\/exception-handling#specific)\n- [Python try with else clause](https:\/\/www.programiz.com\/python-programming\/exception-handling#else)\n- [Python try...finally](https:\/\/www.programiz.com\/python-programming\/exception-handling#try)\n\n## Video: Python Exception Handling (try..except..finally)\n[Previous Tutorial: Python Exceptions](https:\/\/www.programiz.com\/python-programming\/exceptions \"Python Exceptions\")\n\n[Next Tutorial: Python Custom Exceptions](https:\/\/www.programiz.com\/python-programming\/user-defined-exception \"Python Custom Exceptions\")\n\nShare on:\n\nDid you find this article helpful?\n\nYour builder path starts here. Builders don't just know how to code, they create solutions that matter.\n\nEscape tutorial hell and ship real projects.\n\n[Try Programiz PRO](https:\/\/programiz.pro\/?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_content=interests_learn_coding&utm_term=tutorial_page_footer_banner \"Programiz PRO: Premium Learning Platform from Programiz\")\n\n- Real-World Projects\n- On-Demand Learning\n- AI Mentor\n- Builder Community\n\n### Related Tutorials\n[Python Tutorial Python Custom Exceptions](https:\/\/www.programiz.com\/python-programming\/user-defined-exception)\n\n[Python Tutorial Python Exceptions](https:\/\/www.programiz.com\/python-programming\/exceptions)\n\n[Python Tutorial List of Keywords in Python](https:\/\/www.programiz.com\/python-programming\/keyword-list)\n\n[Python Tutorial Python match…case Statement](https:\/\/www.programiz.com\/python-programming\/match-case)\n\n#### Free Tutorials\n- [Python 3 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Ltd. All rights reserved.","attrs_readable_markdown":"In the last tutorial, we learned about [Python exceptions](https:\/\/www.programiz.com\/python-programming\/exceptions). We know that exceptions abnormally terminate the execution of a program.\n\nSince exceptions abnormally terminate the execution of a program, it is important to handle exceptions. In Python, we use the `try...except` block to handle exceptions.\n***\n## Python try...except Block\nThe `try...except` block is used to handle exceptions in Python. Here's the syntax of `try...except` block:\n```\ntry:\n    # code that may cause exception\nexcept:\n    # code to run when exception occurs\n```\nHere, we have placed the code that might generate an exception inside the `try` block. Every `try` block is followed by an `except` block.\n\nWhen an exception occurs, it is caught by the `except` block. The `except` block cannot be used without the try block.\n***\n## Example: Exception Handling Using try...except\n```\ntry:\n    numerator = 10\n    denominator = 0\n\n    result = numerator\/denominator\n\n    print(result)\nexcept:\n    print(\"Error: Denominator cannot be 0.\")\n\n# Output: Error: Denominator cannot be 0.\n```\nIn the example, we are trying to divide a number by **0**. Here, this code generates an exception.\n\nTo handle the exception, we have put the code, `result = numerator\/denominator` inside the `try` block. Now when an exception occurs, the rest of the code inside the `try` block is skipped.\n\nThe `except` block catches the exception and statements inside the `except` block are executed.\n\nIf none of the statements in the `try` block generates an exception, the `except` block is skipped.\n***\n## Catching Specific Exceptions in Python\nFor each `try` block, there can be zero or more `except` blocks. Multiple `except` blocks allow us to handle each exception differently.\n\nThe argument type of each `except` block indicates the type of exception that can be handled by it. For example,\n```\ntry:\n    \n    even_numbers = [2,4,6,8]\n    print(even_numbers[5])\n\nexcept ZeroDivisionError:\n    print(\"Denominator cannot be 0.\")\n    \nexcept IndexError:\n    print(\"Index Out of Bound.\")\n\n# Output: Index Out of Bound\n```\nIn this example, we have created a [list](https:\/\/www.programiz.com\/python-programming\/list) named even\\_numbers.\n\nSince the list index starts from **0**, the last element of the list is at index **3**. Notice the statement,\n```\nprint(even_numbers[5])\n```\nHere, we are trying to access a value to the index **5**. Hence, `IndexError` exception occurs.\n\nWhen the `IndexError` exception occurs in the `try` block,\n\n- The `ZeroDivisionError` exception is skipped.\n- The set of code inside the `IndexError` exception is executed.\n***\n## Python try with else clause\nIn some situations, we might want to run a certain block of code if the code block inside `try` runs without any errors.\n\nFor these cases, you can use the optional `else` keyword with the `try` statement.\n\nLet's look at an example:\n```\n# program to print the reciprocal of even numbers\n\ntry:\n    num = int(input(\"Enter a number: \"))\n    assert num % 2 == 0\nexcept:\n    print(\"Not an even number!\")\nelse:\n    reciprocal = 1\/num\n    print(reciprocal)\n```\n**Output**\n\nIf we pass an odd number:\n```\nEnter a number: 1 Not an even number!\n```\nIf we pass an even number, the reciprocal is computed and displayed.\n```\nEnter a number: 4 0.25\n```\nHowever, if we pass **0**, we get `ZeroDivisionError` as the code block inside `else` is not handled by preceding `except`.\n```\nEnter a number: 0 Traceback (most recent call last): File \"<string>\", line 7, in <module> reciprocal = 1\/num ZeroDivisionError: division by zero\n```\nHere, the [assert](https:\/\/www.programiz.com\/python-programming\/assert-statement) statement in the code checks that `num` is an even number; if num is odd, it raises an `AssertionError`, triggering the except block.\n\n**Note**: Exceptions in the `else` clause are not handled by the preceding except clauses.\n***\n## Python try...finally\nIn Python, the `finally` block is always executed no matter whether there is an exception or not.\n\nThe `finally` block is optional. And, for each `try` block, there can be only one `finally` block.\n\nLet's see an example,\n```\ntry:\n    numerator = 10\n    denominator = 0\n\n    result = numerator\/denominator\n\n    print(result)\nexcept:\n    print(\"Error: Denominator cannot be 0.\")\n    \nfinally:\n    print(\"This is finally block.\")\n```\n**Output**\n```\nError: Denominator cannot be 0. This is finally block.\n```\nIn the above example, we are dividing a number by **0** inside the `try` block. Here, this code generates an exception.\n\nThe exception is caught by the `except` block. And, then the `finally` block is executed.\n***\n**Also Read:**\n\n- [Python built-in Exception](https:\/\/www.programiz.com\/python-programming\/exceptions)\n- [Python user-defined Exception](https:\/\/www.programiz.com\/python-programming\/user-defined-exception)","meta_canonical":null}

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Boilerpipe Text	In the last tutorial, we learned about Python exceptions . We know that exceptions abnormally terminate the execution of a program. Since exceptions abnormally terminate the execution of a program, it is important to handle exceptions. In Python, we use the try...except block to handle exceptions. Python try...except Block The try...except block is used to handle exceptions in Python. Here's the syntax of try...except block: try: # code that may cause exception except: # code to run when exception occurs Here, we have placed the code that might generate an exception inside the try block. Every try block is followed by an except block. When an exception occurs, it is caught by the except block. The except block cannot be used without the try block. Example: Exception Handling Using try...except try: numerator = 10 denominator = 0 result = numerator/denominator print(result) except: print("Error: Denominator cannot be 0.") # Output: Error: Denominator cannot be 0. In the example, we are trying to divide a number by 0 . Here, this code generates an exception. To handle the exception, we have put the code, result = numerator/denominator inside the try block. Now when an exception occurs, the rest of the code inside the try block is skipped. The except block catches the exception and statements inside the except block are executed. If none of the statements in the try block generates an exception, the except block is skipped. Catching Specific Exceptions in Python For each try block, there can be zero or more except blocks. Multiple except blocks allow us to handle each exception differently. The argument type of each except block indicates the type of exception that can be handled by it. For example, try: even_numbers = [2,4,6,8] print(even_numbers[5]) except ZeroDivisionError: print("Denominator cannot be 0.") except IndexError: print("Index Out of Bound.") # Output: Index Out of Bound In this example, we have created a list named even_numbers . Since the list index starts from 0 , the last element of the list is at index 3 . Notice the statement, print(even_numbers[5]) Here, we are trying to access a value to the index 5 . Hence, IndexError exception occurs. When the IndexError exception occurs in the try block, The ZeroDivisionError exception is skipped. The set of code inside the IndexError exception is executed. Python try with else clause In some situations, we might want to run a certain block of code if the code block inside try runs without any errors. For these cases, you can use the optional else keyword with the try statement. Let's look at an example: # program to print the reciprocal of even numbers try: num = int(input("Enter a number: ")) assert num % 2 == 0 except: print("Not an even number!") else: reciprocal = 1/num print(reciprocal) Output If we pass an odd number: Enter a number: 1 Not an even number! If we pass an even number, the reciprocal is computed and displayed. Enter a number: 4 0.25 However, if we pass 0 , we get ZeroDivisionError as the code block inside else is not handled by preceding except . Enter a number: 0 Traceback (most recent call last): File "<string>", line 7, in <module> reciprocal = 1/num ZeroDivisionError: division by zero Here, the assert statement in the code checks that num is an even number; if num is odd, it raises an AssertionError , triggering the except block. Note : Exceptions in the else clause are not handled by the preceding except clauses. Python try...finally In Python, the finally block is always executed no matter whether there is an exception or not. The finally block is optional. And, for each try block, there can be only one finally block. Let's see an example, try: numerator = 10 denominator = 0 result = numerator/denominator print(result) except: print("Error: Denominator cannot be 0.") finally: print("This is finally block.") Output Error: Denominator cannot be 0. This is finally block. In the above example, we are dividing a number by 0 inside the try block. Here, this code generates an exception. The exception is caught by the except block. And, then the finally block is executed. Also Read: Python built-in Exception Python user-defined Exception
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[Try Programiz PRO\!](https://programiz.pro/learn/master-python?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner) #### Popular Tutorials [Getting Started With Python](https://www.programiz.com/python-programming/getting-started?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner "Getting Started With Python") [Python if Statement](https://www.programiz.com/python-programming/if-elif-else?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner "Python if Statement") [while Loop in Python](https://www.programiz.com/python-programming/while-loop?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner "while Loop in Python") [Python Lists](https://www.programiz.com/python-programming/list?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner "Python Lists") [Dictionaries in Python](https://www.programiz.com/python-programming/dictionary?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner "Dictionaries in Python") [Start Learning Python](https://www.programiz.com/python-programming?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner "Python tutorials") [All Python Tutorials](https://www.programiz.com/python-programming?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner "All Python tutorials") #### Reference Materials [Built-in Functions](https://www.programiz.com/python-programming/methods/built-in?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner "Built-in Functions") [List Methods](https://www.programiz.com/python-programming/methods/list?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner "List Methods") [Dictionary Methods](https://www.programiz.com/python-programming/methods/dictionary?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner "Dictionary Methods") [String Methods](https://www.programiz.com/python-programming/methods/string?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner "String Methods") [View all](https://www.programiz.com/python-programming/methods?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_tutorials_banner "Python References") [Python]("Python") [JavaScript]("JavaScript") [C]("C") [C++]("C++") [Java]("Java") [R]("R") [Kotlin]("Kotlin") Become a certified Python programmer. [Try Programiz PRO\!](https://programiz.pro/learn/master-python?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner) #### Popular Examples [Add two numbers](https://www.programiz.com/python-programming/examples/add-number?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner "Add two numbers") [Check prime number](https://www.programiz.com/python-programming/examples/prime-number?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner "Check prime number") [Find the factorial of a number](https://www.programiz.com/python-programming/examples/factorial?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner "Find the factorial of a number") [Print the Fibonacci sequence](https://www.programiz.com/python-programming/examples/fibonacci-sequence?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner "Print the Fibonacci sequence") [Check leap year](https://www.programiz.com/python-programming/examples/leap-year?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner "Check leap year") [All Python Examples](https://www.programiz.com/python-programming/examples?utm_source=programiz.com&utm_medium=referral&utm_audience=ORGANIC-FREEMIUM&utm_campaign=course_promotion&utm_content=interests_learn_python&utm_term=nav_examples_banner "Python Examples") - ### Python Introduction - [Get Started With Python](https://www.programiz.com/python-programming/getting-started "Get Started With Python") - [Your First Python Program](https://www.programiz.com/python-programming/first-program "Your First Python Program") - [Python Comments](https://www.programiz.com/python-programming/comments "Python Comments") - ### Python Fundamentals - [Python Variables and Literals](https://www.programiz.com/python-programming/variables-constants-literals "Python Variables and Literals") - [Python Type Conversion](https://www.programiz.com/python-programming/type-conversion-and-casting "Python Type Conversion") - [Python Basic Input and Output](https://www.programiz.com/python-programming/input-output-import "Python Basic Input and Output") - [Python Operators](https://www.programiz.com/python-programming/operators "Python Operators") - ### Python Flow Control - [Python if...else Statement](https://www.programiz.com/python-programming/if-elif-else "Python if...else Statement") - [Python for Loop](https://www.programiz.com/python-programming/for-loop "Python for Loop") - [Python while Loop](https://www.programiz.com/python-programming/while-loop "Python while Loop") - [Python break and continue](https://www.programiz.com/python-programming/break-continue "Python break and continue") - [Python pass Statement](https://www.programiz.com/python-programming/pass-statement "Python pass Statement") - ### Python Data types - [Python Numbers and Mathematics](https://www.programiz.com/python-programming/numbers "Python Numbers and Mathematics") - [Python List](https://www.programiz.com/python-programming/list "Python List") - [Python Tuple](https://www.programiz.com/python-programming/tuple "Python Tuple") - [Python String](https://www.programiz.com/python-programming/string "Python String") - [Python Set](https://www.programiz.com/python-programming/set "Python Set") - [Python Dictionary](https://www.programiz.com/python-programming/dictionary "Python Dictionary") - ### Python Functions - [Python Functions](https://www.programiz.com/python-programming/function "Python Functions") - [Python Function Arguments](https://www.programiz.com/python-programming/function-argument "Python Function Arguments") - [Python Variable Scope](https://www.programiz.com/python-programming/global-local-nonlocal-variables "Python Variable Scope") - [Python Global Keyword](https://www.programiz.com/python-programming/global-keyword "Python Global Keyword") - [Python Recursion](https://www.programiz.com/python-programming/recursion "Python Recursion") - [Python Modules](https://www.programiz.com/python-programming/modules "Python Modules") - [Python Package](https://www.programiz.com/python-programming/package "Python Package") - [Python Main function](https://www.programiz.com/python-programming/main-function "Python Main function") - ### Python Files - [Python Directory and Files Management](https://www.programiz.com/python-programming/directory "Python Directory and Files Management") - [Python CSV: Read and Write CSV files](https://www.programiz.com/python-programming/csv "Python CSV: Read and Write CSV files") - [Reading CSV files in Python](https://www.programiz.com/python-programming/reading-csv-files "Reading CSV files in Python") - [Writing CSV files in Python](https://www.programiz.com/python-programming/writing-csv-files "Writing CSV files in Python") - ### Python Exception Handling - [Python Exceptions](https://www.programiz.com/python-programming/exceptions "Python Exceptions") - [Python Exception Handling](https://www.programiz.com/python-programming/exception-handling "Python Exception Handling") - [Python Custom Exceptions](https://www.programiz.com/python-programming/user-defined-exception "Python Custom Exceptions") - ### Python Object & Class - [Python Objects and Classes](https://www.programiz.com/python-programming/class "Python Objects and Classes") - [Python Inheritance](https://www.programiz.com/python-programming/inheritance "Python Inheritance") - [Python Multiple Inheritance](https://www.programiz.com/python-programming/multiple-inheritance "Python Multiple Inheritance") - [Polymorphism in Python](https://www.programiz.com/python-programming/polymorphism "Polymorphism in Python") - [Python Operator Overloading](https://www.programiz.com/python-programming/operator-overloading "Python Operator Overloading") - ### Python Advanced Topics - [List comprehension](https://www.programiz.com/python-programming/list-comprehension "List comprehension") - [Python Lambda/Anonymous Function](https://www.programiz.com/python-programming/anonymous-function "Python Lambda/Anonymous Function") - [Python Iterators](https://www.programiz.com/python-programming/iterator "Python Iterators") - [Python Generators](https://www.programiz.com/python-programming/generator "Python Generators") - [Python Namespace and Scope](https://www.programiz.com/python-programming/namespace "Python Namespace and Scope") - [Python Closures](https://www.programiz.com/python-programming/closure "Python Closures") - [Python Decorators](https://www.programiz.com/python-programming/decorator "Python Decorators") - [Python @property decorator](https://www.programiz.com/python-programming/property "Python @property decorator") - [Python RegEx](https://www.programiz.com/python-programming/regex "Python RegEx") - ### Python Date and Time - [Python datetime](https://www.programiz.com/python-programming/datetime "Python datetime") - [Python strftime()](https://www.programiz.com/python-programming/datetime/strftime "Python strftime()") - [Python strptime()](https://www.programiz.com/python-programming/datetime/strptime "Python strptime()") - [How to get current date and time in Python?](https://www.programiz.com/python-programming/datetime/current-datetime "How to get current date and time in Python?") - [Python Get Current Time](https://www.programiz.com/python-programming/datetime/current-time "Python Get Current Time") - [Python timestamp to datetime and vice-versa](https://www.programiz.com/python-programming/datetime/timestamp-datetime "Python timestamp to datetime and vice-versa") - [Python time Module](https://www.programiz.com/python-programming/time "Python time Module") - [Python sleep()](https://www.programiz.com/python-programming/time/sleep "Python sleep()") - ### Additional Topic - [Precedence and Associativity of Operators in Python](https://www.programiz.com/python-programming/precedence-associativity "Precedence and Associativity of Operators in Python ") - [Python Keywords and Identifiers](https://www.programiz.com/python-programming/keywords-identifier "Python Keywords and Identifiers") - [Python Asserts](https://www.programiz.com/python-programming/assert-statement "Python Asserts") - [Python Json](https://www.programiz.com/python-programming/json "Python Json") - [Python pip](https://www.programiz.com/python-programming/pip "Python pip") - [Python \args and \\kwargs](https://www.programiz.com/python-programming/args-and-kwargs "Python args and kwargs ") ### Python Tutorials - [Python Custom Exceptions](https://www.programiz.com/python-programming/user-defined-exception) - [Python Exceptions](https://www.programiz.com/python-programming/exceptions) - [List of Keywords in Python](https://www.programiz.com/python-programming/keyword-list) - [Python match…case Statement](https://www.programiz.com/python-programming/match-case) - [Python if...else Statement](https://www.programiz.com/python-programming/if-elif-else) - [Python String index()](https://www.programiz.com/python-programming/methods/string/index) [![](https://www.programiz.com/sites/tutorial2program/files/dsa-3.png)](https://programiz.pro/dsa-with-visualizer?utm_source=programiz.com&utm_medium=referral&utm_campaign=dsa_with_visualizer_launch_2025&utm_content=interests_learn_dsa&utm_term=top-most-ad-spot-dsa-3) # Python Exception Handling In the last tutorial, we learned about [Python exceptions](https://www.programiz.com/python-programming/exceptions). We know that exceptions abnormally terminate the execution of a program. Since exceptions abnormally terminate the execution of a program, it is important to handle exceptions. In Python, we use the `try...except` block to handle exceptions. * ## Python try...except Block The `try...except` block is used to handle exceptions in Python. Here's the syntax of `try...except` block: ``` try: # code that may cause exception except: # code to run when exception occurs ``` Here, we have placed the code that might generate an exception inside the `try` block. Every `try` block is followed by an `except` block. When an exception occurs, it is caught by the `except` block. The `except` block cannot be used without the try block. * ## Example: Exception Handling Using try...except ``` try: numerator = 10 denominator = 0 result = numerator/denominator print(result) except: print("Error: Denominator cannot be 0.") # Output: Error: Denominator cannot be 0. ``` In the example, we are trying to divide a number by 0. Here, this code generates an exception. To handle the exception, we have put the code, `result = numerator/denominator` inside the `try` block. Now when an exception occurs, the rest of the code inside the `try` block is skipped. The `except` block catches the exception and statements inside the `except` block are executed. If none of the statements in the `try` block generates an exception, the `except` block is skipped. * ## Catching Specific Exceptions in Python For each `try` block, there can be zero or more `except` blocks. Multiple `except` blocks allow us to handle each exception differently. The argument type of each `except` block indicates the type of exception that can be handled by it. For example, ``` try: even_numbers = [2,4,6,8] print(even_numbers[5]) except ZeroDivisionError: print("Denominator cannot be 0.") except IndexError: print("Index Out of Bound.") # Output: Index Out of Bound ``` In this example, we have created a [list](https://www.programiz.com/python-programming/list) named even\_numbers. Since the list index starts from 0, the last element of the list is at index 3. Notice the statement, ``` print(even_numbers[5]) ``` Here, we are trying to access a value to the index 5. Hence, `IndexError` exception occurs. When the `IndexError` exception occurs in the `try` block, - The `ZeroDivisionError` exception is skipped. - The set of code inside the `IndexError` exception is executed. * ## Python try with else clause In some situations, we might want to run a certain block of code if the code block inside `try` runs without any errors. For these cases, you can use the optional `else` keyword with the `try` statement. Let's look at an example: ``` # program to print the reciprocal of even numbers try: num = int(input("Enter a number: ")) assert num % 2 == 0 except: print("Not an even number!") else: reciprocal = 1/num print(reciprocal) ``` Output If we pass an odd number: ``` Enter a number: 1 Not an even number! ``` If we pass an even number, the reciprocal is computed and displayed. ``` Enter a number: 4 0.25 ``` However, if we pass 0, we get `ZeroDivisionError` as the code block inside `else` is not handled by preceding `except`. ``` Enter a number: 0 Traceback (most recent call last): File "<string>", line 7, in <module> reciprocal = 1/num ZeroDivisionError: division by zero ``` Here, the [assert](https://www.programiz.com/python-programming/assert-statement) statement in the code checks that `num` is an even number; if num is odd, it raises an `AssertionError`, triggering the except block. Note: Exceptions in the `else` clause are not handled by the preceding except clauses. * ## Python try...finally In Python, the `finally` block is always executed no matter whether there is an exception or not. The `finally` block is optional. And, for each `try` block, there can be only one `finally` block. Let's see an example, ``` try: numerator = 10 denominator = 0 result = numerator/denominator print(result) except: print("Error: Denominator cannot be 0.") finally: print("This is finally block.") ``` Output ``` Error: Denominator cannot be 0. This is finally block. ``` In the above example, we are dividing a number by 0 inside the `try` block. Here, this code generates an exception. The exception is caught by the `except` block. And, then the `finally` block is executed. * Also Read:** - [Python built-in Exception](https://www.programiz.com/python-programming/exceptions) - [Python user-defined Exception](https://www.programiz.com/python-programming/user-defined-exception) ### Table of Contents - [Introduction](https://www.programiz.com/python-programming/exception-handling#introduction) - [Python try...except Block](https://www.programiz.com/python-programming/exception-handling#try-except) - [Catching Specific Exceptions in Python](https://www.programiz.com/python-programming/exception-handling#specific) - [Python try with else clause](https://www.programiz.com/python-programming/exception-handling#else) - [Python try...finally](https://www.programiz.com/python-programming/exception-handling#try) ## Video: Python Exception Handling (try..except..finally) [Previous Tutorial: Python Exceptions](https://www.programiz.com/python-programming/exceptions "Python Exceptions") [Next Tutorial: Python Custom Exceptions](https://www.programiz.com/python-programming/user-defined-exception "Python Custom Exceptions") Share on: Did you find this article helpful? 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Readable Markdown	In the last tutorial, we learned about [Python exceptions](https://www.programiz.com/python-programming/exceptions). We know that exceptions abnormally terminate the execution of a program. Since exceptions abnormally terminate the execution of a program, it is important to handle exceptions. In Python, we use the `try...except` block to handle exceptions. * ## Python try...except Block The `try...except` block is used to handle exceptions in Python. Here's the syntax of `try...except` block: ``` try: # code that may cause exception except: # code to run when exception occurs ``` Here, we have placed the code that might generate an exception inside the `try` block. Every `try` block is followed by an `except` block. When an exception occurs, it is caught by the `except` block. The `except` block cannot be used without the try block. * ## Example: Exception Handling Using try...except ``` try: numerator = 10 denominator = 0 result = numerator/denominator print(result) except: print("Error: Denominator cannot be 0.") # Output: Error: Denominator cannot be 0. ``` In the example, we are trying to divide a number by 0. Here, this code generates an exception. To handle the exception, we have put the code, `result = numerator/denominator` inside the `try` block. Now when an exception occurs, the rest of the code inside the `try` block is skipped. The `except` block catches the exception and statements inside the `except` block are executed. If none of the statements in the `try` block generates an exception, the `except` block is skipped. * ## Catching Specific Exceptions in Python For each `try` block, there can be zero or more `except` blocks. Multiple `except` blocks allow us to handle each exception differently. The argument type of each `except` block indicates the type of exception that can be handled by it. For example, ``` try: even_numbers = [2,4,6,8] print(even_numbers[5]) except ZeroDivisionError: print("Denominator cannot be 0.") except IndexError: print("Index Out of Bound.") # Output: Index Out of Bound ``` In this example, we have created a [list](https://www.programiz.com/python-programming/list) named even\_numbers. Since the list index starts from 0, the last element of the list is at index 3. Notice the statement, ``` print(even_numbers[5]) ``` Here, we are trying to access a value to the index 5. Hence, `IndexError` exception occurs. When the `IndexError` exception occurs in the `try` block, - The `ZeroDivisionError` exception is skipped. - The set of code inside the `IndexError` exception is executed. * ## Python try with else clause In some situations, we might want to run a certain block of code if the code block inside `try` runs without any errors. For these cases, you can use the optional `else` keyword with the `try` statement. Let's look at an example: ``` # program to print the reciprocal of even numbers try: num = int(input("Enter a number: ")) assert num % 2 == 0 except: print("Not an even number!") else: reciprocal = 1/num print(reciprocal) ``` Output If we pass an odd number: ``` Enter a number: 1 Not an even number! ``` If we pass an even number, the reciprocal is computed and displayed. ``` Enter a number: 4 0.25 ``` However, if we pass 0, we get `ZeroDivisionError` as the code block inside `else` is not handled by preceding `except`. ``` Enter a number: 0 Traceback (most recent call last): File "<string>", line 7, in <module> reciprocal = 1/num ZeroDivisionError: division by zero ``` Here, the [assert](https://www.programiz.com/python-programming/assert-statement) statement in the code checks that `num` is an even number; if num is odd, it raises an `AssertionError`, triggering the except block. Note: Exceptions in the `else` clause are not handled by the preceding except clauses. * ## Python try...finally In Python, the `finally` block is always executed no matter whether there is an exception or not. The `finally` block is optional. And, for each `try` block, there can be only one `finally` block. Let's see an example, ``` try: numerator = 10 denominator = 0 result = numerator/denominator print(result) except: print("Error: Denominator cannot be 0.") finally: print("This is finally block.") ``` Output ``` Error: Denominator cannot be 0. This is finally block. ``` In the above example, we are dividing a number by 0 inside the `try` block. Here, this code generates an exception. The exception is caught by the `except` block. And, then the `finally` block is executed. * Also Read: - [Python built-in Exception](https://www.programiz.com/python-programming/exceptions) - [Python user-defined Exception](https://www.programiz.com/python-programming/user-defined-exception)
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