Re: Is ctypes appropriate in my case?

[Terry Reedy]

du**********@gmail.com wrote:

>

On Wed, Oct 29, 2008 at 6:51 PM, Terry Reedy <tj*****@udel.edu
<mailto:tj*****@udel.edu>wrote:

du**********@gmail.com <mailto:du**********@gmail.comwrote:

Hi,

I've a dll and its header file that controls an hardware. I want
to write a wrapper for this dll in Python.
What is the best way that I can write a wrapper?
What do you want to do with the wrapper?
I'm intending to use STAF - software testing automation framework where
I want to test this dll. Test cases for STAF are written in xml and
python. So for this I want to write a wrapper class for this dll in
python that has Dll API's as the member function of the wrapper class.

This class will be in a python module. This module can be then be
imported in the test cases thereby exposing the dll APIs for testing.

Please suggest if there are better solutions around.


I know ctypes modules and have used it before. As far as I know
ctypes is only used to call the dll functions in a python module.
I am not sure what you mean here. Python code can directly import
and call functions in dlls that represent Python extension modules
and that are placed in the Pythonxx/dlls directory in your Windows
Python installation. Ctypes is mostly used to call functions in a
dll that is *not* a python extension module, that was not written
for Python.

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Well I did not know this. What is a Python extension module?

For CPython, an importable module written in C. There is a doc
Extending and Embedding the Python Interpreter. But I expect you can
write the class in Python with ctypes.