❶ python中len函数

你要print才会输出

#!/bin/python
#coding=gb18030
a="hello"
l=len(a)
printl

❷ len是python内置函数吗

是的

请看下面的内容

>>>importbuiltins
>>>dir(builtins)
['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','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','bytearray','bytes','callable','chr','classmethod','compile','complex','right','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']

❸ python len()函数运算结果

printfaulty[0:5,1]

第一个输出这样试试，应该是有5个元素，你只打印了4个

❹ python中len是什么意思

>>> list = [1,2,3]
>>> len(list)
3
>>> l = '123'
>>> len(l)
3
>>> s = set(list)
>>> s
set([1, 2, 3])
>>> len(s)
3
长度或者元素个数的统计

❺ python 3.2版本如何使用len函数

alist=[1,2,3]
aa=len(alist)
print(aa)

❻ python中sort的key=len的len是什么如果len是函数，那为什没有括号

就是len函数，这个列表是迭代的时候，动态传递的参数

❼ 求大神!!python中len函数运算没有结果

names=['a','b','c','d']
print(len(names))

加上print可以显示的

❽ 关于Python len函数问题

虽然我觉得你已经解决了不过还是回答一下，line 1 括号里面的"I ask the world what is the love："是直接输出的，你直接在后面写你想要颠倒的内容就行，程序本身是正确的。