marshmallow
PyPIactive
marshmallow last released 4.3.1 on 2026-08-08. Its latest version requires Python >=3.10.
Facts
- Latest release
- 4.3.1, (2 months ago)
- First published
- (12 years ago)
- Releases in the last 12 months
- 11
- Median days between releases
- 13
- Median days between major versions
- 522
- Monthly downloads
- 115,605,635
- License
- MIT
- Repository
- github.com/marshmallow-code/marshmallow
- Source
- pypi.org (checked 2026-10-19)
Major versions
5 major versions have been published.
| Major | First version | First released | Latest version | Latest released |
|---|---|---|---|---|
| 4 | 4.0.0 | 2025-04-17 | 4.3.1 | 2026-08-08 |
| 3 | 3.0.0a1 | 2017-02-26 | 3.26.2 | 2025-12-22 |
| 2 | 2.0.0a1 | 2015-04-25 | 2.21.0 | 2020-03-05 |
| 1 | 1.0.0 | 2014-11-16 | 1.2.6 | 2015-05-03 |
| 0 | 0.1.0 | 2013-11-11 | 0.7.0 | 2014-06-22 |
Runtime requirements
The latest version of marshmallow declares these runtime constraints.
| Runtime | Constraint | Minimum version | Since version | Since |
|---|---|---|---|---|
| Python | >=3.10 | 3.10 | 4.1.0 | 2025-11-01 |
Supported runtimes
The latest version of marshmallow runs on 6 tracked runtime releases.
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