用virtualenv管理Python3運行環境:
https://www.cnblogs.com/hiddenfox/p/virtualenv-python3.html
用virtualenv管理Python3運行環境:
https://www.cnblogs.com/hiddenfox/p/virtualenv-python3.html
class MetaCls(type): def __new__(cls, *args, **kwargs): print("in MetaCls") # return super(Meta