One great feature of Boost.Python is the ability to write custom converters from Python types to C++ arguments. Most Boost.Python documentation, including the incredibly helpful post by misspent, show you how to write “rvalue” converters (e.g., pass-by-value or pass-by-const-reference).
However if you need to wrap a function which takes a
FILE* argument the previous approach will not prove fruitful. But Boost.Python is clearly capable of handling a similar situation, namely the implicit conversion from a Python string type to a
char* type. Since the conversion from the internal
char* is likely to be done with the PyString_AsString function, I went off in search of that code.