Why function is static in python?

Question

If we want to integrate C/C++ into python using internal Python API. Then signature of functions are in the following forms

static PyObject *MyFunction( PyObject *self, PyObject *args );

static PyObject *MyFunctionWithKeywords(PyObject *self,
                             PyObject *args,
                             PyObject *kw);

static PyObject *MyFunctionWithNoArgs( PyObject *self );

Why these functions are implemented as static?

Answer 1

From the docs:

Portability therefore requires not to make any assumptions about symbol visibility. This means that all symbols in extension modules should be declared static, except for the module’s initialization function, in order to avoid name clashes with other extension modules (as discussed in section The Module’s Method Table and Initialization Function). And it means that symbols that should be accessible from other extension modules must be exported in a different way.