PyPI Stats
CameleoGrey

greyjack

GreyJack Solver is a constraint metaheuristic solver for Python, built on the robust foundations of Rust and Polars. It empowers you to tackle a wide array of constraint optimization problems, including continuous, integer, and mixed-integer challenges with ease and efficiency.
PyPI GitHub
Downloads
Day
7
Week
35
Month
3.4K
Stars
2
Forks
1
Issues
0
Version
0.3.8

Package Insights

What's this?
Score breakdown - each component scores 0–100, weighted by percentage
Maintenance
40
Popularity
9
Adoption
35
Community
30
How the maintenance status was determined
Last commit
193 days ago
Monthly downloads
3,367
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
3,367
Stars
2
Stars per 1k downloads
0.59
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
5
Month daily avg
112
Momentum
—
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Momentum not reported for packages with < 5,000 monthly downloads — percentages are noisy at low volume.
Python 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
MIT License
• 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
273 days ago
Total releases
16
Releases/year
13.5
• 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
1
Monthly downloads
3,367
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
5
 
Issue Burden
-
per 1k stars
Discussions
-
per 1k stars
Fork Ratio
100.0%
contrib / forks
Stale Release
80d
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

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

Downloads by OS

No OS data available

Python Versions

No Python version data available

Top Countries

1. CA CA
1
2. US US
1

Dependencies

14

Used By

0
Not used by any tracked packages

Package Information

License
MIT License
First Release
February 26, 2025
Last Release
9 months ago
Last Commit
6 months ago
Latest Version
0.3.8
Total Releases
16
Contributors
1
Open PRs
0
Archived
No
Python Versions
3 3.9 3.10 3.11 3.12 3.13
Wheels
cp312
Keywords
greyjack solver optimization polars metaheuristic genetic algorithm
Topics
ai genetic-algorithm metaheuristics optimization optimization-algorithms optimizer solver constrained-optimization constraint-programming cvrptw operations-research planning-algorithms python rust scheduling-algorithms solver-library vrp vrptw polars
Tracking Since
January 6, 2026
Data Updated
May 3, 2026
Data Freshness
Fresh

Links