I follow the step, copy the module.cpp but when I import the .pyc, there is a problem that

Message=dynamic module does not define module export function (PyInit_superfastcode)
Source=C:\Users\xmmzz\Desktop\py_C_code\Python_test\Python_test\Python_test.py
StackTrace:
File "C:\Users\xmmzz\Desktop\py_C_code\Python_test\Python_test\Python_test.py", line 30, in
import superfastcode

how can I solve the problem. Is that I am doing something wrong?