Comments on: ctypes tricks

By: In Traction » Blog Archive » Fun with Python, OpenCV and face detection

Fri, 27 Jun 2008 13:08:51 +0000

[...] that you would like to use, give ctypes a try. Gary Bishop wrote about a couple of interesting ctypes tricks to make the process [...]

By: gb

gb — Tue, 06 Mar 2007 00:55:59 +0000

My example above is like that, except mine has multiple outputs followed by an optional input. I don’t recall if I’ve called it with the optional input but I think it works. Email me a snippet of code and maybe I can spot something.

By: RW

RW — Mon, 05 Mar 2007 23:11:12 +0000

Like your ctype tricks. Been trying out the function prototype trick.

My particular function call as a (input, output, input) argument list. When i pass the 2 for the output type I get a TypeError: c_wchar_p ‘out’ parameter must be passed as default value.

I cannot find any reference as to what that means. Curious if you have ran into this?

Thanks