PyRank
marshmallow-code

marshmallow-oneofschema

marshmallow library extension that allows schema (de)multiplexing
PyPI GitHub Verified repo
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

marshmallow-oneofschema has 6.7M monthly downloads and 143 GitHub stars. Version 3.2.0 supports Python 3.9+, first published in 2016.

It is actively maintained under a permissive license, last released in May 2025.

It is built on top of marshmallow. It is used by 28 tracked packages, including apispec-oneofschema, ansys-hps-client and starknet-py.

GitHub topics include marshmallow and polymorphic.

Downloads
Day
220.4K
Week
1.5M
Month
6.7M
Stars
143
Forks
45
Issues
20
Version
3.2.0

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
90
Popularity
46
Adoption
70
Community
65
Provenance
100
How the maintenance status was determined
Last commit
5 days ago
Monthly downloads
6,654,227
• 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
6,654,227
Stars
143
Stars per 1k downloads
0.02
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
212,904
Month daily avg
221,808
Momentum
-4.0%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
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
424 days ago
Total releases
17
Releases/year
1.6
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
15
Monthly downloads
6,654,227
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
64
 
Issue Burden
139.9
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
33.3%
contrib / forks
Stale Release
419d
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

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

Downloads by OS

Linux 108.7K
Windows 236
macOS 205

Python Versions

3.11
31.5% 33.1K
3.10
30.6% 32.1K
3.12
23.2% 24.4K
3.9
7.8% 8.2K
3.7
6.9% 7.3K

Top Countries

1. US US
79.1K
2. IE IE
12.2K
3. SG SG
6.1K
4. DE DE
2.9K
5. GB GB
2.2K
6. TH TH
1.0K
7. IN IN
790
8. CA CA
605
9. AU AU
552
10. FR FR
544
GitHub Topics
Tags from the package's GitHub repository describing what it does.

Package Information

License
MIT License
First Release
March 15, 2016
Last Release
1 year ago
Last Commit
6 days ago
Latest Version
3.2.0
Total Releases
17
Contributors
15
Open PRs
7
Archived
No
Python Versions
3 3.9 3.10 3.11 3.12 3.13
Wheels
py2 py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links