gh-105522: Correctly handle possible exceptions in Enum creation in test_enum

[sobolevn]

This is simplier now! 🎉

• Issue: Modernize test_enum by removing unused exception handling #105522

[sobolevn]

Here's how a potential exception looks like:

======================================================================
ERROR: test_pickle_enum (test.test_enum.TestSpecial.test_pickle_enum)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/sobolev/Desktop/cpython/Lib/test/test_enum.py", line 1458, in test_pickle_enum
    raise Stooges
  File "/Users/sobolev/Desktop/cpython/Lib/test/test_enum.py", line 65, in <module>
    class Stooges(Enum):
  File "/Users/sobolev/Desktop/cpython/Lib/enum.py", line 494, in __prepare__
    raise RuntimeError('Exc', cls)
RuntimeError: ('Exc', 'Stooges')

And here's how it looks if there are multiple exceptions:

======================================================================
ERROR: test_floatenum_fromhex (test.test_enum.TestSpecial.test_floatenum_fromhex)
----------------------------------------------------------------------
  + Exception Group Traceback (most recent call last):
  |   File "/Users/sobolev/Desktop/cpython/Lib/test/test_enum.py", line 55, in inner
  |     raise ExceptionGroup('Enum Exceptions', excs)
  | ExceptionGroup: Enum Exceptions (2 sub-exceptions)
  +-+---------------- 1 ----------------
    | Traceback (most recent call last):
    |   File "/Users/sobolev/Desktop/cpython/Lib/test/test_enum.py", line 81, in <module>
    |     class FloatStooges(float, Enum):
    |   File "/Users/sobolev/Desktop/cpython/Lib/enum.py", line 494, in __prepare__
    |     raise RuntimeError('Exc', cls)
    | RuntimeError: ('Exc', 'FloatStooges')
    +---------------- 2 ----------------
    | Traceback (most recent call last):
    |   File "/Users/sobolev/Desktop/cpython/Lib/test/test_enum.py", line 108, in <module>
    |     class IntFlagStooges(IntFlag):
    |   File "/Users/sobolev/Desktop/cpython/Lib/enum.py", line 494, in __prepare__
    |     raise RuntimeError('Exc', cls)
    | RuntimeError: ('Exc', 'IntFlagStooges')
    +------------------------------------

[sobolevn]

@ethanfurman friendly ping :)

[sobolevn]

@ethanfurman friendly ping (x2) 😄

[ethanfurman]

One minor change and it looks good!

[ethanfurman]

Suggested change

	def reraise_enum_exceptions(*enum_types_or_exceptions):
	def reraise_if_not_enum(*enum_types_or_exceptions):

[sobolevn]

Done! 👍

[bedevere-bot]

A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

Once you have made the requested changes, please leave a comment on this pull request containing the phrase I have made the requested changes; please review again. I will then notify any core developers who have left a review that you're ready for them to take another look at this pull request.

[sobolevn]

I have made the requested changes; please review again

[bedevere-bot]

Thanks for making the requested changes!

@ethanfurman: please review the changes made to this pull request.