PyRank
lmmentel

mendeleev

A python package for accessing various properties of elements, ions and isotopes in the periodic table of elements.
PyPI GitHub
More links
Download Stats Documentation
Verified repo
Monthly downloads
105.8K
Weekly downloads
33.8K
GitHub stars
305

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

Package Information

Latest Version
1.3.0
Requires Python
<3.15,>=3.10
Licence
MIT
Last Release
1 month ago
Author
Lukasz Mentel
First Release
July 10, 2015
Total Releases
54
Python Versions
3 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
80
Popularity
52
Adoption
90
Community
40
Provenance
100
How the maintenance status was determined
Last commit
36 days ago
Monthly downloads
105,839
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
105,839
Stars
305
Stars per 1k downloads
2.88
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
4,833
Month daily avg
3,528
Momentum
+37.0%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
More insights and metrics
Python version support tiers
requires_python
<3.15,>=3.10
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
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
36 days ago
Total releases
54
Releases/year
4.8
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
10
Monthly downloads
105,839
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
51
 
Issue Burden
3.3
per 1k stars
Discussions
9.8
per 1k stars
Fork Ratio
18.9%
contrib / forks
Stale Release
No
 
PR Velocity
Quiet
 
Not all downloads include detailed metadata. Breakdowns reflect the subset that does.

Downloads by OS

Linux 2.5K
macOS 77
Windows 71

Python Versions

3.13
41.1% 1.1K
3.12
29.8% 760
3.10
13.6% 348
3.11
11.7% 298
3.14
3.8% 96

Top Countries

1. US US
2.4K
2. BE BE
421
3. FR FR
227
4. HK HK
120
5. CN CN
56
6. SG SG
48
7. JP JP
20
8. IN IN
13
9. CA CA
12
10. DE DE
11

Weekly Downloads

GitHub Stars

Dependencies

10
4 optional dependencies

Used By

64
View all 64 dependents

Repository details

Forks
53
Issues
1
Last Commit
1 month ago
Contributors
10
Open PRs
2
Archived
No

Data and sources

Tracking Since
September 26, 2026
Data Updated
October 11, 2026
Data Freshness
Fresh
Keywords
periodic table chemistry elements science
Sources and methodology