0 basic python-14.1 Python documentation resources: Notes and Dir ()

1. List of document Resources

Form	Role
#注释	Documents in the file
Dir function	List of available properties in the object
Document string: __doc__	A document near the object
Pydoc:help ()	Interactive Help for objects
Pydoc:html Report	Module documentation in the browser
Standard Manual	Formal voice and library instructions
Site Resources	Online tutorials, examples, etc.
Published books	Business Reference Books

2. Notes

Use the # notation, generally used to illustrate small functions, if the larger type of functionality, generally use the document string

>>> alist=[] #新建一个列表

3.dir ()

Built-in function dir () a simple way to grab all the list of properties available within an object

>>> import sys>>> dir (sys) [' __displayhook__ ', ' __doc__ ', ' __excepthook__ ', ' __interactivehook__ ', ' __loader__ ', ' __name__ ', ' __package__ ', ' __spec__ ', ' __stderr__ ', ' __stdin__ ', ' __stdout__ ', ' _clear_type_cache ', ' _ Current_frames ', ' _debugmallocstats ', ' _getframe ', ' _home ', ' _mercurial ', ' _xoptions ', ' api_version ', ' argv ', ' base_ ' Exec_prefix ', ' base_prefix ', ' builtin_module_names ', ' byteorder ', ' call_tracing ', ' callstats ', ' copyright ', ' Displayhook ', ' dllhandle ', ' dont_write_bytecode ', ' exc_info ', ' excepthook ', ' exec_prefix ', ' executable ', ' exit ', ' Flags ', ' float_info ', ' float_repr_style ', ' getallocatedblocks ', ' getcheckinterval ', ' getdefaultencoding ', ' Getfilesystemencoding ', ' getprofile ', ' getrecursionlimit ', ' getrefcount ', ' getsizeof ', ' getswitchinterval ', ' Gettrace ', ' getwindowsversion ', ' hash_info ', ' hexversion ', ' implementation ', ' int_info ', ' Intern ', ' maxsize ', ' Maxunicode ', ' meta_path ', ' modules ', ' path ', ' path_hooks ', ' path_importer_cache ', ' platform ', ' prefix', ' setcheckinterval ', ' setprofile ', ' setrecursionlimit ', ' setswitchinterval ', ' settrace ', ' stderr ', ' stdin ', ' stdout '  , ' Thread_info ', ' Version ', ' Version_info ', ' warnoptions ', ' winver ']>>>

If you need to find out the properties and methods provided by the object, we can pass in an empty object, such as:

>>> dir (()) [' __add__ ', ' __class__ ', ' __contains__ ', ' __delattr__ ', ' __dir__ ', ' __doc__ ', ' __eq__ ', ' __format_ _ ', ' __ge__ ', ' __getattribute__ ', ' __getitem__ ', ' __getnewargs__ ', ' __gt__ ', ' __hash__ ', ' __init__ ', ' __iter__ ', ' __le_ _ ', ' __len__ ', ' __lt__ ', ' __mul__ ', ' __ne__ ', ' __new__ ', ' __reduce__ ', ' __reduce_ex__ ', ' __repr__ ', ' __rmul__ ', ' __ Setattr__ ', ' __sizeof__ ', ' __str__ ', ' __subclasshook__ ', ' count ', ' Index ']>>> dir ([]) [' __add__ ', ' __class__ ' , ' __contains__ ', ' __delattr__ ', ' __delitem__ ', ' __dir__ ', ' __doc__ ', ' __eq__ ', ' __format__ ', ' __ge__ ', ' __getattribute __ ', ' __getitem__ ', ' __gt__ ', ' __hash__ ', ' __iadd__ ', ' __imul__ ', ' __init__ ', ' __iter__ ', ' __le__ ', ' __len__ ', ' __lt__ ', ' __mul__ ', ' __ne__ ', ' __new__ ', ' __reduce__ ', ' __reduce_ex__ ', ' __repr__ ', ' __reversed__ ', ' __rmul__ ', ' __setattr__ ', ' __setitem__ ', ' __sizeof__ ', ' __str__ ', ' __subclasshook__ ', ' append ', ' clear ', ' copy ', ' Count ', ' extend ', ' index ', ' Insert ', ' pop ', ' remove ', ' reverse ', ' sort ']>>>Dir (') [' __add__ ', ' __class__ ', ' __contains__ ', ' __delattr__ ', ' __dir__ ', ' __doc__ ', ' __eq__ ', ' __format__ ', ' __ge__ ', ' __getattribute__ ', ' __getitem__ ', ' __getnewargs__ ', ' __gt__ ', ' __hash__ ', ' __init__ ', ' __iter__ ', ' __le__ ', ' __len__ ' , ' __lt__ ', ' __mod__ ', ' __mul__ ', ' __ne__ ', ' __new__ ', ' __reduce__ ', ' __reduce_ex__ ', ' __repr__ ', ' __rmod__ ', ' __rmul__ ' , ' __setattr__ ', ' __sizeof__ ', ' __str__ ', ' __subclasshook__ ', ' capitalize ', ' casefold ', ' center ', ' count ', ' encode ', ' EndsWith ', ' expandtabs ', ' find ', ' format ', ' Format_map ', ' index ', ' isalnum ', ' isalpha ', ' isdecimal ', ' isdigit ', ' Isidentifier ', ' islower ', ' isnumeric ', ' isprintable ', ' isspace ', ' istitle ', ' isupper ', ' join ', ' ljust ', ' lower ', ' Lstrip ', ' Maketrans ', ' partition ', ' replace ', ' rfind ', ' rindex ', ' rjust ', ' rpartition ', ' rsplit ', ' Rstrip ', ' Split ', ' SPL  Itlines ', ' startswith ', ' strip ', ' swapcase ', ' title ', ' Translate ', ' upper ', ' Zfill ']>>>

Or we can pass the name of the object:

Summary, this chapter mainly lists the documentation resources, and briefly explains the comments and the Dir function

This chapter is here, thank you.

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0 Basic python-14.1 Python documentation resources: Comments and Dir ()