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SWIG, F2PY, and Boost.Python. These tools let you wrap C/C++, Fortran, and C++ code, respectively. Although you 
could write your own wrapper code for accessing your extension modules, using a tool like one of these takes a lot of 
the tedium out of the job—and makes it more likely that the result will be correct. For example, when using SWIG,  
you run a command-line tool on your C (or C++) header files, and wrapper code is generated. A bonus to using SWIG 

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Appendix A 
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 pedAl to the MetAl: AccelerAting python
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is that it can generate wrappers for a lot of other languages, beside Python, so your extension could be available for 
Java or PHP as well, for example.