Bug report

Bug description:

Attribute _type_ of c_ulong returns L, which is correct following the format characters documentation; however, the documentation says it has 4 bytes size, but sizeof(c_ulong) returns 8 bytes.

>>> sizeof(c_ulong)
8
>>> c_ulong._type_
'L'

Also c_ulonglong is automatically casted to c_ulong:

t5=c_ulonglong(200000000000000000000000000000000000)
>>> type(t5)
<class 'ctypes.c_ulong'>

, thus if c_ulong will have 4 bytes, will be there available a type of 8 bytes size?

CPython versions tested on:

3.8

Operating systems tested on:

Linux

Linked PRs

• gh-108907: ctypes: Document _type_ codes #145837
• [3.14] gh-108907: ctypes: Document _type_ codes (GH-145837) #146328