C Extension question-> How handle lists and tuples as arguments?

[Gerhard Häring]

Christian Seberino wrote:
> Py_ParseTuple is a great C function to set C variables from
> Python objects in a C extension.
> 
> Usage is straight forward for integers and strings but I'm wondering
> what to do if I ever want to send in a list or tuple.
> 
> First problem is that we don't know the LENGTH of the list/tuple.
> 
> Second problem is we don't know the TYPES of the elements.

I don't understand your problem. For "other" parameters, use "O" as 
format character in ParseTuple...(). Then if you need to check if the 
passed parameter is a sequence (either tuple or list), you can just use 
PySequenceCheck().

For the rest, use the functions for the sequence protocol, like 
PySequence_Length() and the like.

HTH,

-- Gerhard