No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
cons has 1.2M monthly downloads and 12 GitHub stars. Version 0.4.7 supports Python 3.9+, first published in 2019.
It is stably maintained, last released in Jul 2025.
It is built on top of logical-unification. It is used by 7 tracked packages, including pytensor, etuples and minikanren.
GitHub topics include scheme-like, lisp-like and algebraic-data-types.
Package Insights
Package Risks
- Moderate bus factor: only 3 contributor(s) for this download volume
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
70
Popularity
21
Adoption
80
Community
20
Provenance
0
How the maintenance status was determined
Last commit
69 days ago
Monthly downloads
1,213,970
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
1,213,970
Stars
12
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
41,554
Month daily avg
40,466
Momentum
+2.7%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
>=3.9
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
Not specified
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
Package does not declare a license.
How the release cadence was determined
Last release
360 days ago
Total releases
18
Releases/year
2.6
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
3
Monthly downloads
1,213,970
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
35
Issue Burden
-
per 1k stars
Discussions
-
per 1k stars
Fork Ratio
100.0%
contrib / forks
Stale Release
290d
PR Velocity
Quiet
Weekly Downloads
GitHub Stars
Not all downloads include detailed metadata. Breakdowns reflect the subset that does.
Downloads by OS
Linux
19.8K
macOS
1.0K
Windows
322
Python Versions
3.12
53.0%
10.5K
3.11
20.8%
4.1K
3.10
11.6%
2.3K
3.13
7.7%
1.5K
3.9
6.9%
1.4K
Top Countries
1.
US
14.2K
US
2.
IE
2.9K
IE
3.
SG
1.3K
SG
4.
CN
884
CN
5.
HK
427
HK
6.
DE
265
DE
7.
NL
257
NL
8.
GB
211
GB
9.
AU
73
AU
10.
JP
61
JP
Dependencies
1
- logical-unification >=0.4.0
1 optional dependencies
- pytest[test]
GitHub Topics
Tags from the package's GitHub repository describing what it does.
Package Information
License
Unknown
First Release
August 4, 2019
Last Release
12 months ago
Last Commit
2 months ago
Latest Version
0.4.7
Total Releases
18
Contributors
3
Open PRs
0
Archived
No
Python Versions
3
3.9
3.10
3.11
Wheels
py2
py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh