[C++-sig] How to convert a Python Tuple into a C/C++ array?

[Jinming Xu]

Hello everyone,

While embedding my C++ program with Python, I am impeded by the conversion 
from a Python Tuple to a C++ array.  I hope to get some assistance from you 
guys.

I have a sequence of float numbers to be passed from Python to C++, with 
indefinite size. So I chose to use Tuple on the Python side.  Since 
PyArg_ParseTuple() has no appropriate format to parse Tuple (The Tuple I am 
saying is not the Tuple of arguments) of arbitray size, I simply passed the 
tuple as follows

PyObject* myTuple;
  if(!PyArg_ParseTuple(args,"O",&myTuple))
    return NULL;

Now I have the pointer, myTuple, to the Tuple passed in. How can I convert 
the the entired tuple, myTuple pointing to, into a float array, or convert 
an individual element into a C/C++ float number? Are there any conversion 
functions?

Any suggestions or hints will be deeply appreciated!

Thanks in advance!

Jinming

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