Python built-in variables

Python Hidden variables

__doc__  # Indicates comments in this document
__FILE__ # Indicates the path to this file  
__PACKAGE__ # The folder path where the imported py file is located
__CACHED__ # Cache of import files
__name__  #如果是主文件 __name__ = "__main__" otherwise equals function name

#!/usr/bin/env python#-*-coding:utf-8-*-"""{' __builtins__ ': <module ' builtins ' (built-in);, ' __package__ ': None, ' __cached__ ': none, ' __file_     _ ': ' c:/users/administrator/pycharmproject/myproject/myfunc/ceshi.py ', ' __doc__ ': None, ' __name__ ': ' __main__ ', ' __loader__ ': <_frozen_importlib_external. Sourcefileloader object at 0x0000026ec5a58978>, ' __spec__ ': None}"""if __name__=='__main__':    Print(__file__)    Print(__doc__)    Print(VARs ())

Operation Result:

c:/users/administrator/pycharmproject/myproject/myfunc/ceshi.py # __file__{# __doc__'__builtins__': <module'Builtins'(built-inch) >,     '__package__': None,'__cached__': None,'__file__':'c:/users/administrator/pycharmproject/myproject/myfunc/ceshi.py',     '__doc__': None,'__name__':'__main__',     '__loader__': <_frozen_importlib_external. Sourcefileloader Object at 0x0000026ec5a58978>,    '__spec__': None}
# VARs () {'__cached__': None,'__package__': None,'__doc__':"\n{\n ' __builtins__ ': <module ' builtins ' (built-in), \ n ' __package__ ': none,\n ' __cached__ ': none,\n ' __file__ ': ' c:/users/administrator/pycharmproject/myproject/myfunc/ceshi.py ', \ n ' __doc__ ': None, \ n ' __name__ ': ' __main__ ', \ n ' __loader__ ': <_frozen_importlib_external. Sourcefileloader object at 0x0000026ec5a58978>,\n ' __spec__ ': none}\n",'__builtins__': <module'Builtins'(built-inch);'__file__':'c:/users/administrator/pycharmproject/myproject/myfunc/ceshi.py','__loader__': <_frozen_importlib_external. Sourcefileloader object at 0x000002354bfb8978>'__spec__': None,'__name__':'__main__'}

Python built-in variables