New submission from Reuben Thomas <r...@sc3d.org>:
The CTypes documentation has this example: >>> s = c_char_p() >>> s.value = "abc def ghi" >>> s.value 'abc def ghi' >>> s.value is s.value False >>> It appears not to have been updated since Python 2: in Python 3, you can't assign a str to a c_char_p. If one tries the example code above, one gets: >>> s = c_char_p() >>> s.value = "abc def ghi" Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: bytes or integer address expected instead of str instance Using a bytes works: >>> s = c_char_p() >>> s.value = b"abc def ghi" >>> s.value b'abc def ghi' >>> s.value is s.value False >>> Hence adding the two "b"s is an obvious fix. Note that the similar example with c_wchar_p does work fine with str. ---------- assignee: docs@python components: Documentation messages: 347725 nosy: docs@python, rrt priority: normal severity: normal status: open title: Incorrect use of c_char_p in example code versions: Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue37571> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
