python怎么看一个函数的用法,Python查看函数
1、help()
帮助()函数可以比较详细的介绍一个函数的使用方法。
如:
帮助(打印)
helponbuilt-infunctionprintinmodulebuildins :
打印(.)
打印(值,sep= ,end=\n ,file=sys.stdout,flush=False)
Printsthevaluestoastream,ortosys.stdoutbydefault .
可选关键字参数:
文件:类似文件的对象(流);defaultstothecurrentsys.stdout .
sep :在值之间插入字符串,默认为空格.
end : stringappendedafterthelastvalue,defaultanewline .
冲水:不管是不是强制冲水。相关推荐: 《Python入门教程》
2、dir()
目录()函数可以列出所查询内容的内置属性和方法。
如:
导演(str)
[__add__ , __class__ , __contains__ , __delattr__ , __dir__ , __doc__ , __eq__ , __format__ , __ge__ ,
__getattribute__ , __getitem__ , __getnewargs__ , __gt__ , __hash__ , __init__ , __init_subclass__ ,
__iter__ , __le__ , __len__ , __lt__ , __mod__ , __mul__ , __ne__ , __new__ , __reduce__ , __reduce_ex__ ,
__repr__ , __rmod__ , __rmul__ , __setattr__ , __sizeof__ , __str__ , __subclasshook__ ,大写,
'casefold','center','count','encode','endswith','expandtabs','find','format','format_map','index','isalnum',
'isalpha','isascii','isdecimal','isdigit','isidentifier','islower','isnumeric','isprintable','isspace',
'istitle','isupper','join','ljust','lower','lstrip','maketrans','partition','replace','rfind','rindex',
'rjust','rpartition','rsplit','rstrip','split','splitlines','startswith','strip','swapcase','title',
'translate','upper','zfill']dir()也可以查询python的内置方法。
>>>dir(__builtins__)3、xx.__doc__['ArithmeticError','AssertionError','AttributeError','BaseException','BlockingIOError','BrokenPipeError',
'BufferError','BytesWarning','ChildProcessError','ConnectionAbortedError','ConnectionError',
'ConnectionRefusedError','ConnectionResetError','DeprecationWarning','EOFError','Ellipsis','EnvironmentError',
'Exception','False','FileExistsError','FileNotFoundError','FloatingPointError','FutureWarning','GeneratorExit',
'IOError','ImportError','ImportWarning','IndentationError','IndexError','InterruptedError','IsADirectoryError',
'KeyError','KeyboardInterrupt','LookupError','MemoryError','ModuleNotFoundError','NameError','None',
'NotADirectoryError','NotImplemented','NotImplementedError','OSError','OverflowError','PendingDeprecationWarning',
'PermissionError','ProcessLookupError','RecursionError','ReferenceError','ResourceWarning','RuntimeError',
'RuntimeWarning','StopAsyncIteration','StopIteration','SyntaxError','SyntaxWarning','SystemError','SystemExit',
'TabError','TimeoutError','True','TypeError','UnboundLocalError','UnicodeDecodeError','UnicodeEncodeError',
'UnicodeError','UnicodeTranslateError','UnicodeWarning','UserWarning','ValueError','Warning','WindowsError',
'ZeroDivisionError','_','__build_class__','__debug__','__doc__','__import__','__loader__','__name__',
'__package__','__spec__','abs','all','any','ascii','bin','bool','breakpoint','bytearray','bytes',
'callable','chr','classmethod','compile','complex','copyright','credits','delattr','dict','dir','divmod',
'enumerate','eval','exec','exit','filter','float','format','frozenset','getattr','globals','hasattr',
'hash','help','hex','id','input','int','isinstance','issubclass','iter','len','license','list','locals',
'map','max','memoryview','min','next','object','oct','open','ord','pow','print','property','quit',
'range','repr','reversed','round','set','setattr','slice','sorted','staticmethod','str','sum','super',
'tuple','type','vars','zip']
查看使用帮助,一般为创建该类时候的备注。
4、xx.__dict__
查看对象所拥有的属性。
5、在IDLE中点击help中的python docs
在输入栏中打上你要查找的内容直接搜索,不过这里应该只有python自带的一下基本的模块。
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