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From: Amaury Forgeot d'Arc <report@bugs.python.org>
To: breamoreboy@yahoo.co.uk
Sent: Tue, 21 September, 2010 18:56:51
Subject: [issue1962] ctypes feature request: Automatic type conversion of input arguments to C functions


Amaury Forgeot d'Arc <amauryfa@gmail.com> added the comment:

I don't think this should happen by default.
but what the user wants is already possible, by using the from_param() method.  For example, the AutoStrParam type converts everything to a string (and a char*):

from ctypes import *

class AutoStrParam(c_char_p):
    @classmethod
    def from_param(cls, value):
        return str(value)

strlen = cdll.LoadLibrary('msvcrt').strlen
strlen.argtypes = [AutoStrParam]

print strlen(None)    # "None"          ->  4
print strlen(type)    # "<type 'type'>" -> 13

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nosy: +amaury.forgeotdarc

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Python tracker <report@bugs.python.org>
<http://bugs.python.org/issue1962>
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