npy?!

if npy == "男朋友":
    return "a"
elif npy == "女朋友":
    return "b"
elif npy == "男炮友":
    return "c"
elif npy == "女炮友":
    return "d"
else:
    return None

import numpy as npy

男仆呀
牛批呀

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'npy' is not defined