命名规范

Python 之父 Guido 推荐的规范

Type	Public	Internal
Modules	lower_with_under	_lower_with_under
Packages	lower_with_under
Classes	CapWords	_CapWords
Exceptions	CapWords
Functions	lower_with_under	_lower_with_under
Global/Class Constants	CAPS_WITH_UNDER	_CAPS_WITH_UNDER
Global/Class Variables	lower_with_under	_lower_with_under
Instance Variables	lower_with_under	_lower_with_under (protected) or __lower_with_under (private)
Method Names	lower_with_under	_lower_with_under (protected) or __lower_with_under (private)
Function/Method Parameters	lower_with_under
Local Variables	lower_with_under