#!/usr/bin/env python
# encoding:utf-8

"""
@software: PyCharm
@file: __init__.py.py
@time: 2017/4/30 12:46
函数
"""


def c_test():
    print('abc')

if c_test() is not None:
    print('c_test 不返回None')
else:
    print('c_test 返回 None')