PyPI Stats
21cmFAST

21cmfast

Official repository for 21cmFAST: a code for generating fast simulations of the cosmological 21cm signal
PyPI GitHub
Downloads
Day
188
Week
989
Month
3.9K
Stars
76
Forks
50
Issues
68
Version
4.1.1

Package Insights

What's this?
Score breakdown - each component scores 0–100, weighted by percentage
Maintenance
100
Popularity
43
Adoption
35
Community
70
How the maintenance status was determined
Last commit
4 days ago
Monthly downloads
3,897
• 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
3,897
Stars
76
Stars per 1k downloads
19.50
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
141
Month daily avg
130
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
>=3.11
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
35 days ago
Total releases
27
Releases/year
4.1
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
18
Monthly downloads
3,897
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
76
 
Issue Burden
-
per 1k stars
Discussions
-
per 1k stars
Fork Ratio
36.0%
contrib / forks
Stale Release
No
 
PR Velocity
Active
 

Weekly Downloads

GitHub Stars

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

Downloads by OS

Linux 15
Windows 2
macOS 1

Python Versions

3.8
44.4% 8
3.10
22.2% 4
3.11
16.7% 3
3.12
16.7% 3

Top Countries

1. US US
57
2. ES ES
54
3. TW TW
54
4. RU RU
10
5. IN IN
4
6. HK HK
3
7. GB GB
1
8. SE SE
1

Dependencies

16
42 optional dependencies

Used By

3

Package Information

License
MIT license
First Release
September 19, 2019
Last Release
1 month ago
Last Commit
4 days ago
Latest Version
4.1.1
Total Releases
27
Contributors
18
Open PRs
10
Archived
No
Author
The 21cmFAST coredev team
Python Versions
3 3.9 3.10 3.11
Keywords
Epoch of Reionization Cosmology
Topics
-
Tracking Since
January 6, 2026
Data Updated
May 3, 2026
Data Freshness
Fresh

Links