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[3.8] bpo-37571: Add 'b' to prevent the TypeError exception. (GH-14721) #14762

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Jul 14, 2019
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[3.8] bpo-37571: Add 'b' to prevent the TypeError exception. (GH-14721) #14762

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11 changes: 8 additions & 3 deletions Doc/library/ctypes.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -1178,12 +1178,17 @@ the root-object's underlying buffer.
Another example that may behave different from what one would expect is this::

>>> s = c_char_p()
>>> s.value = "abc def ghi"
>>> s.value = b"abc def ghi"
>>> s.value
'abc def ghi'
b'abc def ghi'
>>> s.value is s.value
False
>>>
>>>

.. note::

Objects instantiated from :class:`c_char_p` can only have their value set to bytes
or integers.

Why is it printing ``False``? ctypes instances are objects containing a memory
block plus some :term:`descriptor`\s accessing the contents of the memory.
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