Tell what version of zlib python was built with

Question

How can I tell what version of the C library python's zlib module was built with?

Specifically, I want to tell whether it was a new enough version to support ZLIB_RSYNC=1

This is different than the version of the zlib python module, but instead the version of the underlying C library

Answer 1

It is zlib.ZLIB_VERSION:

>>> import zlib
>>> zlib.ZLIB_VERSION
'1.2.7'