You can't. Use t = PyTuple_New(n) instead, and fill it with objects using PyTuple_SetItem(t, i, o) -- note that this "eats" a reference count of o, so you have to Py_INCREF it. Lists have similar functions PyList_New(n) and PyList_SetItem(l, i, o). Note that you must set all the tuple items to some value before you pass the tuple to Python code -- PyTuple_New(n) initializes them to NULL, which isn't a valid Python value.

CATEGORY: extending