`keyword.iskeyword()` and `keyword.issoftkeyword()` don't accept the unhashable types `list`, `dict` and `bytearray` but accept `set`

[hyperkai]

Bug report

Bug description:

keyword.iskeyword() and keyword.issoftkeyword() don't accept the unhashable types list, dict and bytearray as shown below:

from keyword import iskeyword

print(iskeyword([1, 2, 3]))         # TypeError: unhashable type: 'list'
print(iskeyword({'name':'John'}))   # TypeError: unhashable type: 'dict'
print(iskeyword(bytearray(b'ABC'))) # TypeError: unhashable type: 'bytearray'

from keyword import issoftkeyword

print(issoftkeyword([1, 2, 3]))         # TypeError: unhashable type: 'list'
print(issoftkeyword({'name':'John'}))   # TypeError: unhashable type: 'dict'
print(issoftkeyword(bytearray(b'ABC'))) # TypeError: unhashable type: 'bytearray'

But keyword.iskeyword() and keyword.issoftkeyword() accept the unhashable type set as shown below:

from keyword import iskeyword

print(iskeyword({1, 2, 3}))
# False

from keyword import issoftkeyword

print(issoftkeyword({1, 2, 3}))
# False

And, keyword.iskeyword() and keyword.issoftkeyword() accept the hashable types str, bytes, tuple and frozenset as shown below:

from keyword import iskeyword

print(iskeyword('ABC'))
print(iskeyword(b'ABC'))
print(iskeyword((1, 2, 3)))
print(iskeyword(frozenset([1, 2, 3])))
# False

from keyword import issoftkeyword

print(issoftkeyword('ABC'))
print(issoftkeyword(b'ABC'))
print(issoftkeyword((1, 2, 3)))
print(issoftkeyword(frozenset([1, 2, 3])))
# False

So, keyword.iskeyword() and keyword.issoftkeyword() shouldn't accept all unhashable types including set for consistency.

CPython versions tested on:

3.12

Operating systems tested on:

Windows

[skirpichev]

Documentation doesn't mention anything about hashability, for instance:

keyword.iskeyword(s)¶

Return True if s is a Python keyword.

The purpose of the module:

This module allows a Python program to determine if a string is a keyword or soft keyword.

It's not specified what happened when you feed these functions with a garbage. Garbage in - garbage out.