06.01.20 00:20, hrfu...@gmail.com пише:
I've worked out MyCallFunction() in my actual code in the same manner described above, but with Py_VaBuildValue. What I did was I send all variadic arguments to a MyBuildValue(PyObject*, const char*, ...), the in the .c file, MyBuildValue will generate a va_list and pass it onto Py_VaBuildValue, then I force the outcome to be a tuple and pass it to PyObject_CallObject and it works! Nontheless, this approach seems less straightforward to having a PyObject_VaCallFunction, so I'm guessing it may have performance penalty.
You should not worry much about performance penalty of creating a tuple if you use format string and variable arguments, because the latter have large overhead. In common cases using Py_VaBuildValue() should be enough. In performance critical code use PyObject_CallObject() or PyObject_Call(). Or even private C API like _PyObject_FastCallDict() on your risk.
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