Bug: loads broken on Python 3.12 and 3.13

[davidosterberg]

The example in the readme.txt crash on Python 3.12 and above.

I think the issue is a bug in pandas: (pandas-dev/pandas#58604)

[victorazzo]

@davidosterberg - thanks for flagging. Will try to reproduce and check the fix as suggested this weekend.

[davidosterberg]

Repeating what is said in the pandas issues: the error is due to the way in which Pandas handles the [:] indexer in Python 3.12. This comes from a python/cpython#101264 in Python 3.12 which makes slice objects hashable.