Bug report

Bug description:

In the following MRE,code.co_firstlineno correctly returns 4, the first line number of the class definition, butgetsource(code) returns the content of the entire file:

importsysfrominspectimportgetsourceclassA:code=sys._getframe(0).f_codeprint(code.co_firstlineno)print(getsource(code))

This is becauseinspect.findsource uses a regex pattern that does not matchclass:

CPython versions tested on:

3.12

Operating systems tested on:

Linux, Windows

Linked PRs

• gh-116987: Remove re pattern check in inspect.findsource as it's not needed anymore #117025