[CMake] Finding Python Modules with CMake

[Todd Gamblin]

Is there a way in CMake, once I find the python interpreter, to query for the availability of a particular module?  e.g. say I want to make sure that the host's python installation has PyQt4, or numy, or something like that.  Do I have to manually run the interpreter, try to import it, and check the return code, or is there a builtin for that?

Something like this would be handy for the python modules:

	http://www.gnu.org/software/autoconf-archive/ax_python_module.html

Again, I couldn't find much in the docs for this.

-Todd

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