PyRank
muCommons

nistchempy

Unofficial Python tools for querying NIST Chemistry WebBook pages and extracting molecular-property records.
PyPI GitHub
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
Downloads
Day
25
Week
155
Month
815
Stars
58
Forks
7
Issues
6
Version
2.0.0

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
60
Popularity
33
Adoption
29
Community
10
Provenance
0
How the maintenance status was determined
Last commit
47 days ago
Monthly downloads
815
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
815
Stars
58
Stars per 1k downloads
71.17
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
Needs at least 1,000 monthly downloads to classify popularity.
How download momentum is calculated
Week daily avg
22
Month daily avg
27
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
• 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
47 days ago
Total releases
5
Releases/year
1.1
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
1
Monthly downloads
815
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
17
 
Issue Burden
-
per 1k stars
Discussions
-
per 1k stars
Fork Ratio
14.3%
contrib / forks
Stale Release
No
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

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

Downloads by OS

Linux 4
Windows 2

Python Versions

3.10
33.3% 2
3.13
33.3% 2
3.14
33.3% 2

Top Countries

1. US US
7
2. CN CN
3
3. ES ES
2
4. SE SE
2

Dependencies

4
16 optional dependencies

Used By

1

Package Information

License
MIT
First Release
March 3, 2022
Last Release
1 month ago
Last Commit
1 month ago
Latest Version
2.0.0
Total Releases
5
Contributors
1
Open PRs
0
Archived
No
Wheels
py3
Keywords
NIST Chemistry WebBook chemical data molecular properties spectral data mass spectra infrared spectra gas chromatography cheminformatics scientific Python physical chemistry
Tracking Since
January 14, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links