🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 71 (from laksa038)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa071.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, meta_canonical AS meta_canonical, ml_categories_json AS ml_categories_json, ml_types_json AS ml_types_json, ml_intent_types_json AS ml_intent_types_json, meta_language AS meta_language, attrs_author AS attrs_author, ifNull(toUnixTimestamp(attrs_publish_time), 0) AS attrs_publish_time, ifNull(toUnixTimestamp(attrs_original_publish_time), 0) AS attrs_original_publish_time, ifNull(attrs_is_republished, 0) AS attrs_is_republished, ifNull(attrs_nr_words, 0) AS attrs_nr_words, ifNull(attrs_boilerpipe_nr_words, 0) AS attrs_boilerpipe_nr_words, ifNull(body_ext_links_number, 0) AS body_ext_links_number, ifNull(body_int_links_number, 0) AS body_int_links_number, ifNull(meta_nofollow, 0) AS meta_nofollow, ifNull(meta_noarchive, 0) AS meta_noarchive, ifNull(props_was_rendered, 0) AS props_was_rendered, ifNull(src_redirect, \'\') AS src_redirect, ifNull(download_time_msec, 0) AS download_time_msec, ifNull(download_ttfb_msec, 0) AS download_ttfb_msec, ifNull(download_size, 0) AS download_size FROM crawler3.page_info_local FINAL PREWHERE int_partition_id = 28 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://realpython.com/courses/python-metaclasses/\')), getAhrefsUnparsedNoserviceFromURL(\'https://realpython.com/courses/python-metaclasses/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/realpython.com\/courses\/python-metaclasses\/","crawl_time":1779868936,"first_indexed_time":1684246984,"http_code":200,"src_unparsed":"com,realpython!\/courses\/python-metaclasses\/ s443","src_root_hash":"13351397557425671","history_drop_reason":null,"meta_title":"Metaclasses in Python – Real Python","meta_descriptions":["Metaclasses are an important but mysterious behind-the-scenes mechanism for instantiating classes in Python. In this video course, you'll learn how Python's metaclasses work in object-oriented programming."],"meta_canonical":null,"ml_categories_json":"{\"\/Computers_and_Electronics\":937,\"\/Computers_and_Electronics\/Programming\":901,\"\/Computers_and_Electronics\/Programming\/Scripting_Languages\":859,\"\/Jobs_and_Education\":167,\"\/Jobs_and_Education\/Education\":167,\"\/Jobs_and_Education\/Education\/Computer_Education\":151}","ml_types_json":"{\"\/Video\":884,\"\/Video\/Tutorial_or_Guide\":882}","ml_intent_types_json":"{\"Informational\":898,\"Commercial\":256}","meta_language":"en","attrs_author":"Real Python","attrs_publish_time":0,"attrs_original_publish_time":1684246984,"attrs_is_republished":0,"attrs_nr_words":"615","attrs_boilerpipe_nr_words":"182","body_ext_links_number":11,"body_int_links_number":72,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":161,"download_ttfb_msec":160,"download_size":12447}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 71 · Partition 28

laksa071

13351397557425671

📄

INDEXABLE

✅

CRAWLED

7 days ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0.2 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property

Value

URL

https://realpython.com/courses/python-metaclasses/

Last Crawled

2026-05-27 08:02:16 (7 days ago)

First Indexed

2023-05-16 14:23:04 (3 years ago)

HTTP Status Code

200

Content

Meta Title

Metaclasses in Python – Real Python

Meta Description

Metaclasses are an important but mysterious behind-the-scenes mechanism for instantiating classes in Python. In this video course, you'll learn how Python's metaclasses work in object-oriented programming.

Meta Canonical

null

Boilerpipe Text

heavy column, fetched on demand

Markdown

heavy column, fetched on demand

Readable Markdown

heavy column, fetched on demand

ML Classification

ML Categories

/Computers_and_Electronics		93.7%
/Computers_and_Electronics/Programming		90.1%
/Computers_and_Electronics/Programming/Scripting_Languages		85.9%
/Jobs_and_Education		16.7%
/Jobs_and_Education/Education		16.7%
/Jobs_and_Education/Education/Computer_Education		15.1%

Raw JSON

{
    "/Computers_and_Electronics": 937,
    "/Computers_and_Electronics/Programming": 901,
    "/Computers_and_Electronics/Programming/Scripting_Languages": 859,
    "/Jobs_and_Education": 167,
    "/Jobs_and_Education/Education": 167,
    "/Jobs_and_Education/Education/Computer_Education": 151
}

ML Page Types

/Video		88.4%
/Video/Tutorial_or_Guide		88.2%

Raw JSON

{
    "/Video": 884,
    "/Video/Tutorial_or_Guide": 882
}

ML Intent Types

Informational		89.8%
Commercial		25.6%

Raw JSON

{
    "Informational": 898,
    "Commercial": 256
}

Content Metadata

Language

Author

Real Python

Publish Time

not set

Original Publish Time

2023-05-16 14:23:04 (3 years ago)

Republished

Word Count (Total)

615

Word Count (Content)

182

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Redirect Target

null

Performance

Download Time (ms)

161

TTFB (ms)

160

Download Size (bytes)

12,447

Location

Host ID

71 (laksa071)

Partition ID

Root Hash

13351397557425671

Unparsed URL

com,realpython!/courses/python-metaclasses/ s443