On Windows, os.getcwdb() is implemented using getcwd() on Windows. This function uses the ANSI code page, whereas PEP 529 "Change Windows filesystem encoding to UTF-8" is supposed to use UTF-8 for all bytes paths and filenames. Moreover, this function emits a DeprecationWarning, whereas PEP 529 was supposed to avoid the need to deprecated bytes paths and filenames on Windows.

I guess that it was forgotten in the implementation of the PEP 529. Or was it a deliberate choice?

Attached PR modify os.getcwdb() to use UTF-8.