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POPython C API: PyEval_CallFunction?
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copied!<p>I've discovered a function in the Python C API named <code>PyEval_CallFunction</code> which seems to be useful. It allows you to invoke a Python callable by saying something like:</p> <pre><code>PyEval_CallFunction(obj, "OOO", a, b, c); </code></pre> <p>However, I can't find any official documentation on this function. A google search brings up various <a href="http://starship.python.net/crew/mwh/toext/calling-python-from-c.html" rel="nofollow"><em>unofficial</em> tutorials</a> which discuss this function, but:</p> <ol> <li><p>The function <a href="http://docs.python.org/release/3.0.1/search.html?q=PyEval_CallFunction&check_keywords=yes&area=default" rel="nofollow">isn't documented</a> in the official Python docs, so I don't know if it's even something that is supposed to be part of the public API.</p></li> <li><p>Searching the web turns up inconsistent usage policies. Some tutorials indicate the format string needs parenthesis around the type list, like <code>"(OiiO)"</code>, whereas other times I see it used without the parenthesis. When I actually try the function in a real program, it seems to require the parenthesis, otherwise it segfaults.</p></li> </ol> <p>I'd like to use this function because it's convenient. Does anyone know anything about this, or know why it <a href="http://docs.python.org/release/3.0.1/search.html?q=PyEval_CallFunction&check_keywords=yes&area=default" rel="nofollow">isn't documented</a>? Is it part of the public API?</p>

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