New submission from Amir Aslan Haghrah <amiraslanhagh...@gmail.com>:
If you define a structure which contains an 'c_int' and a 'c_double' member.
Then run the sizeof() function for it you get 16 as result as follows:
---------------------------------------------
from ctypes import c_int
from ctypes import c_double
from ctypes import sizeof
from ctypes import Structure
from struct import Struct
class issueInSizeof(Structure):
_fields_ = [('KEY', c_int),
('VALUE', c_double)]
print(sizeof(issueInSizeof))
---------------------------------------------
output:
16
---------------------------------------------
In continue if you add another 'c_int' to your structure and run sizeof()
function as follows. It return 16 too.
---------------------------------------------
from ctypes import c_int
from ctypes import c_double
from ctypes import sizeof
from ctypes import Structure
from struct import Struct
class issueInSizeof(Structure):
_fields_ = [('Index', c_int),
('KEY', c_int),
('VALUE', c_double)]
print(sizeof(issueInSizeof))
---------------------------------------------
output:
16
---------------------------------------------
If python assume the size of 'c_int' 4, then it should return 12 in the first
run. Also if it assume the size of 'c_int' 8 then it should return 24 in the
second run.
thanks in advance.
----------
components: ctypes
messages: 332355
nosy: Amir Aslan Haghrah
priority: normal
severity: normal
status: open
title: Issue in sizeof() function
type: behavior
versions: Python 3.7
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue35562>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
