Bug report

Bug description:

import struct

class MyStruct(struct.Struct):
    def __init__(self):
        super().__init__('>h')

obj = MyStruct()

When I run this code I receive an error:

Traceback (most recent call last):
  File "/home/user/bug.py", line 7, in <module>
    obj = MyStruct()
          ^^^^^^^^^^
TypeError: Struct() missing required argument 'format' (pos 1)

It is rather strange error, I have passed format parameter to base class constructor, I receive this error with any value of format parameter.
There are no any problems with this code in Python 3.11 and older.

CPython versions tested on:

3.12

Operating systems tested on:

Linux

Linked PRs

• gh-112358: Fix Python 3.12 regression with subclassing struct.Struct. #112424
• [3.12] gh-112358: Fix Python 3.12 regression with subclassing struct.Struct (GH-112424) #112426