Seems a bug for new version of numpy

For the latest version of numpy (1.19.0 at 2022.7), the code can not get a result.  I check the code, and find that the line 62 in the birkhoff.py (  print(list(zip(*(matches.items()))))  ) seems don't work correctly.

When replace the "list" with "tuple", it works well. (The line 62 is "print(tuple(zip(*(matches.items()))))").