PyRank
kaitai-io

kaitaistruct

Kaitai Struct: runtime for Python
PyPI GitHub Verified repo
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

kaitaistruct has 8.1M monthly downloads and 107 GitHub stars. Version 0.11, first published in 2016.

It is actively maintained under a permissive license, last released in Sep 2025.

It is built on top of enum34. It is used by 50 tracked packages, including mitmproxy, polyfile-weave and abi3audit.

GitHub topics include kaitai-struct.

Downloads
Day
244.1K
Week
1.8M
Month
8.1M
Stars
107
Forks
32
Issues
7
Version
0.11

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
70
Popularity
43
Adoption
70
Community
55
Provenance
100
How the maintenance status was determined
Last commit
20 days ago
Monthly downloads
8,051,893
• Active
Activity within 30 days
Stable
Activity within 31-180 days
Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
8,051,893
Stars
107
Stars per 1k downloads
0.01
Industry Standard
> 10,000,000 monthly downloads
• Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
Community Favorite
> 5 stars per 1k downloads
Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
256,032
Month daily avg
268,396
Momentum
-4.6%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python version support tiers
requires_python
!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7
Cutting Edge
Minimum supported version is 3.12 or newer
Modern
Minimum supported version is 3.9, 3.10, or 3.11
• Legacy
Supports 3.8 or older (or Python 2)
Unknown
No requires_python specified or unparseable
License categories
License
MIT
• Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
301 days ago
Total releases
9
Releases/year
0.9
Rapid
Last release within 365 days and > 12 releases/year
• Regular
Last release within 365 days
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
17
Monthly downloads
8,051,893
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
• Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
65
 
Issue Burden
65.4
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
53.1%
contrib / forks
Stale Release
280d
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

Not all downloads include detailed metadata. Breakdowns reflect the subset that does.

Downloads by OS

Linux 88.7K
Windows 6.0K
macOS 3.4K

Python Versions

3.12
46.4% 43.1K
3.13
18.1% 16.9K
3.11
15.7% 14.6K
3.14
10.1% 9.4K
3.10
9.7% 9.0K

Top Countries

1. US US
82.6K
2. DE DE
3.3K
3. GB GB
2.7K
4. IN IN
1.9K
5. SG SG
943
6. NL NL
930
7. CN CN
751
8. JP JP
682
9. IE IE
654
10. FR FR
526
GitHub Topics
Tags from the package's GitHub repository describing what it does.

Package Information

License
MIT
First Release
November 3, 2016
Last Release
10 months ago
Last Commit
3 weeks ago
Latest Version
0.11
Total Releases
9
Contributors
17
Open PRs
7
Archived
No
Author
Kaitai Project
Python Versions
2 2.7 3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13
Wheels
py2 py3
Keywords
kaitai struct construct ksy declarative data structure data format file format packet format binary parser parsing unpack development
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links