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Advocate PyTuple_Pack instead of manual building of tuples

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Antoine Pitrou 2011-12-03 22:30:19 +01:00
parent f35204055e
commit 48383bfc67
1 changed files with 1 additions and 6 deletions
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Doc/faq/extending.rst
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@ -99,12 +99,7 @@ many other useful protocols.
How do I use Py_BuildValue() to create a tuple of arbitrary length?
-------------------------------------------------------------------
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 :c:func:`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.
You can't. Use :c:func:`PyTuple_Pack` instead.
How do I call an object's method from C?