In Python2.x, I used PyFile_Check(obj) to check if a parameter was a
file object.
Now, in Python3.0 the same object (obtained as open('file.bin','wb'))
is an
io.BufferedWriter object.
How do I perform type checking for such an object in the extension
module,
and how do I extract a FILE * object from it? I browsed the C API
documentation, but
couldn't find an answer.
The purpose is to dump the contents of a Python extension type to disk
as
binary data using C's fwrite() function.
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