Having trouble using CTypes with a custom function
tkondal at gmail.com
tkondal at gmail.com
Wed Oct 4 14:18:16 EDT 2006
Hi all.
I just started looking at Python's ctypes lib and I am having trouble
using it for a function.
For starters, here's my Python code:
from ctypes import*;
myStringDLL= cdll.LoadLibrary("myStringDLL.dll");
GetMyString = getattr(myStringDLL,
"?GetMyString@@YA_NAAV?$basic_string at DU?$char_traits at D@std@@V?$allocator at D@2@@std@@@Z")
strString = create_string_buffer('\000' * 256);
GetMyString.restype = c_int;
GetMyString.argtypes = [c_char_p];
bResult = GetMyString (strSerialNumber);
print (bResult);
print (strSerialNumber);
#C++ Prototype of the function I want to call:
#bool GetMyString (string& stringParam) ;
I do not have access to the source code of this function so don't ask
me to try different things in C++. This DLL is working fine.
The problem that I have is that print (strSerialNumber) does not seem
to print the correct string. What I get is some garbage value of
unprintable characters. Am I using this the correct way?
Thanks.
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