cattrs

Composable complex class support for attrs and dataclasses.

cattrs has been downloaded 1,690,938,427 times in total on PyPI, including 48,487,082 in the last 30 days. The latest version is 26.1.0, released Feb 18, 2026. It is distributed under the MIT license.

Version26.1.0
Downloads
1.69G
LicenseMIT
AuthorTin Tvrtkovic
UpdatedFeb 18, 2026

Downloads

Weekly, last 90d.
Includes CI traffic.

VersionsTotal26.*25.*
Range
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Granularity
Group by
CI traffic
Stack: OffCI: Included3 / 45 series
Selected total314.08M
1.7GAll-time
48.5MLast 30 days
1.4MLast 24 h
12.88/sPer second

Version distribution

Share of downloads by released version. Computed over the last quarter.

  • 01

    26.1.0

    70.6M downloads
    36.5%
  • 02

    25.3.0

    20.1M downloads
    10.4%
  • 03

    24.1.3

    19.9M downloads
    10.3%
  • 04

    24.1.2

    13.2M downloads
    6.8%
  • 05

    25.1.1

    12.1M downloads
    6.3%
  • 06

    24.1.0

    10.7M downloads
    5.5%
  • 07

    25.2.0

    10.3M downloads
    5.3%
  • 08

    23.2.3

    8.7M downloads
    4.5%
  • 09

    Other

    27.8M downloads
    14.4%

Guess the next day

Thirteen recent days of cattrs downloads. Drag the green handle on the right to guess where day fourteen lands.

TRUTH1.4M1.5MFRISATSUNMONTUEWEDTHUFRISATSUNMONTUEWED
    cattrs · 1.7G downloads on PyPI