cattrs

Composable complex class support for attrs and dataclasses.

cattrs has been downloaded 1,692,222,628 times in total on PyPI, including 47,021,423 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 total316.25M
1.7GAll-time
47.0MLast 30 days
1.3MLast 24 h
13.12/sPer second

Version distribution

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

  • 01

    26.1.0

    70.2M downloads
    36.5%
  • 02

    25.3.0

    20.0M downloads
    10.4%
  • 03

    24.1.3

    19.8M downloads
    10.3%
  • 04

    24.1.2

    13.0M downloads
    6.8%
  • 05

    25.1.1

    12.0M downloads
    6.2%
  • 06

    24.1.0

    10.5M downloads
    5.5%
  • 07

    25.2.0

    10.2M downloads
    5.3%
  • 08

    23.2.3

    8.6M downloads
    4.5%
  • 09

    Other

    28.1M downloads
    14.6%

Guess the next day

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

TRUTH1.3M1.4MSATSUNMONTUEWEDTHUFRISATSUNMONTUEWEDTHU