Feature or enhancement

Proposal:

This is already provided by zlib, and is useful for computing a crc32 in multiple chunks (not linearly).

What I currently do is use ctypes, but that doesn't work on all environments (like Windows). I don't think we'll need a pure python fallback, just a wrapper of what's in zlib, equivalent ofhttps://github.com/fastzip/fastzip/blob/9019107a6732fab9004e625b075faab96f29265a/fastzip/_crc32_combine.py#L63-L67

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-134635: addzlib.{adler32,crc32}_combine to combine checksums #134650