build_ext.py 文件源码

def get_export_symbols (self, ext):
        """Return the list of symbols that a shared extension has to
        export.  This either uses 'ext.export_symbols' or, if it's not
        provided, "init" + module_name.  Only relevant on Windows, where
        the .pyd file (DLL) must export the module "init" function.
        """
        initfunc_name = "init" + ext.name.split('.')[-1]
        if initfunc_name not in ext.export_symbols:
            ext.export_symbols.append(initfunc_name)
        return ext.export_symbols