PyRank
lmfit

uncertainties

Transparent calculations with uncertainties on the quantities involved (aka "error propagation"); calculation of derivatives.
PyPI GitHub
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Download Stats Changelog Documentation Issues
Verified repo
Monthly downloads
2.2M
Weekly downloads
616.5K
GitHub stars
680

Downloads in the 30 and 7 days to October 10, 2026. Refreshed weekly.

Package Information

Latest Version
3.2.4
Requires Python
>=3.8
Licence
Revised BSD License
Last Release
9 months ago
First Release
June 8, 2010
Total Releases
81
Python Versions
3 3.8 3.9 3.10 3.11 3.12 3.13 3.14
No reported malware or high/critical advisories · Details

The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
65
Popularity
59
Adoption
100
Community
60
Provenance
100
How the maintenance status was determined
Last commit
107 days ago
Monthly downloads
2,160,971
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
2,160,971
Stars
680
Stars per 1k downloads
0.31
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
88,073
Month daily avg
72,032
Momentum
+22.3%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
More insights and metrics
Python version support tiers
requires_python
>=3.8
Cutting Edge
Minimum supported version is 3.14 or newer
Modern
Minimum supported version is 3.11 to 3.13
• Legacy
Supports 3.10 or older (or Python 2)
Unknown
No requires_python specified or unparseable
License categories
License
Revised BSD 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
279 days ago
Total releases
81
Releases/year
4.9
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
27
Monthly downloads
2,160,971
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
72
 
Issue Burden
114.7
per 1k stars
Discussions
36.8
per 1k stars
Fork Ratio
30.7%
contrib / forks
Stale Release
172d
 
PR Velocity
Active
 
Not all downloads include detailed metadata. Breakdowns reflect the subset that does.

Downloads by OS

Linux 105.3K
macOS 1.7K
Windows 1.2K

Python Versions

3.13
73.1% 77.6K
3.12
13.2% 14.0K
3.11
6.5% 6.9K
3.10
4.8% 5.1K
3.14
2.4% 2.5K

Top Countries

1. US US
104.4K
2. SG SG
1.0K
3. BE BE
520
4. DE DE
456
5. CH CH
421
6. FR FR
312
7. GB GB
312
8. JP JP
276
9. CN CN
270
10. ES ES
262

Weekly Downloads

GitHub Stars

Dependencies

0
9 optional dependencies

Used By

198
View all 198 dependents

Repository details

Forks
88
Issues
78
Last Commit
3 months ago
Contributors
27
Open PRs
15
Archived
No

Data and sources

Tracking Since
September 26, 2026
Data Updated
October 11, 2026
Data Freshness
Fresh
Keywords
error propagation uncertainties uncertainty calculations standard deviation derivatives partial derivatives differentiation
Sources and methodology