where to find the spec of format in PyObject_CallMethod

[Huayang Xia]

I am trying to use PyObject_CallMethod. It needs a format string to
specify what are the followed arguments. Is it possible to use a
PyObject* as an argument?

Where can I find the spec for the format?

Thanks in advance.

 

[Carsten Haese]

I am trying to use PyObject_CallMethod. It needs a format string to
specify what are the followed arguments. Is it possible to use a
PyObject* as an argument?

Where can I find the spec for the format?

Thanks in advance.

See http://docs.python.org/api/object.html#l2h-247 :

Note in particular "The C arguments are described by a Py_BuildValue()
format string that should produce a tuple" and "Note that if you only
pass PyObject * args, PyObject_CallMethodObjArgs is a faster
alternative."

So, If all your arguments are PyObject pointers, use
PyObject_CallMethodObjArgs instead. Otherwise, use PyObject_CallMethod
and consult the documentation for Py_BuildValue on how to construct the
format string.

Hope this helps,

Carsten.

 

[Huayang Xia]

Thanks. I have mixed arguments.

I found the format spec @ http://docs.python.org/api/arg-parsing.html