For a couple of sequences (bytes, list, tuple, bytearray), the error when using an invalid sequence index is misleading, because it says that only integers are allowed, while slices are allowed too.>>> a = []>>> a['python']Traceback (most recent call last):  File "<stdin>", line 1, in <module>TypeError: list indices must be integers, not str>>>For instance, here's how range does it:>>> range(1)['a']Traceback (most recent call last):  File "<stdin>", line 1, in <module>TypeError: range indices must be integers or slices, not strThe attached patch improves these error messages.

New changeset02d6d3a7a181 by Terry Jan Reedy in branch 'default':Issue#22077: Improve index error messages for bytearrays, bytes, lists, andhttp://hg.python.org/cpython/rev/02d6d3a7a181

while at it, I changed bytearray messages to include bad type as other do.