passing a single character/multiple character user input from a python function to a C++ function

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I have a C++ .dll function that I am accessing through python 3.2 with the syntax:

C++

int Create(char argID)

and I am trying to access this function using python. I can access it, but I am confused on why it is telling for 'wrong type' whenever I try to pass the function an argument. Python Script:

Delphi

Create.argtypes = [c_char]
Create.restype = c_int
ID = c_char
ID = input("Enter ID:")
Create(ID) #ctypes.ArgumentError: argument 1: <class 'TypeError'>: wrong type

Not sure where I am going wrong or is there a different way to pass a character or characters from the user input? Kindly help.

Cheers.

Posted 16-Sep-11 0:45am

Mobile.Instinct

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Mobile.Instinct · Accepted Answer · 2011-09-16T01:22:00

I have been able to figure out the answer, so just posting it for other users if they come across this problem.

SQL

A c_char is a one-byte value, not a Unicode string. Set ID = bytes(ID, 'utf8')[0] (or use a different 8-bit character mapping than 'utf8', such as 'latin-1'). Then you can call Create(ID).

By the way, assigning ID to c_char only gives you another reference to c_char, and then you immediately reassign ID to the returned string from input. The only time I see this is when people are working with ctypes. It's like the brain gets stuck in static typing mode.