元组操作

￡神魔★判官ぃ 2021-10-18 21:32 441阅读 0赞

元组是一种序列，它与列表一样，唯一不同的是列表是可修改的，而元组不可以，元组的创建也是较为简单的。

1、元组创建

*  直接使用逗号、圆括号

t=(1,2,3)
    print(type(t))#<class 'tuple'>

*  使用关键字tuple

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class tuple(object):
        """
        tuple() -> empty tuple
        tuple(iterable) -> tuple initialized from iterable's items
        
        If the argument is a tuple, the return value is the same object.
        """
        def count(self, value): # real signature unknown; restored from __doc__
            """ T.count(value) -> integer -- return number of occurrences of value """
            return 0
    
        def index(self, value, start=None, stop=None): # real signature unknown; restored from __doc__
            """
            T.index(value, [start, [stop]]) -> integer -- return first index of value.
            Raises ValueError if the value is not present.
            """
            return 0
    
        def __add__(self, *args, **kwargs): # real signature unknown
            """ Return self+value. """
            pass
    
        def __contains__(self, *args, **kwargs): # real signature unknown
            """ Return key in self. """
            pass
    
        def __eq__(self, *args, **kwargs): # real signature unknown
            """ Return self==value. """
            pass
    
        def __getattribute__(self, *args, **kwargs): # real signature unknown
            """ Return getattr(self, name). """
            pass
    
        def __getitem__(self, *args, **kwargs): # real signature unknown
            """ Return self[key]. """
            pass
    
        def __getnewargs__(self, *args, **kwargs): # real signature unknown
            pass
    
        def __ge__(self, *args, **kwargs): # real signature unknown
            """ Return self>=value. """
            pass
    
        def __gt__(self, *args, **kwargs): # real signature unknown
            """ Return self>value. """
            pass
    
        def __hash__(self, *args, **kwargs): # real signature unknown
            """ Return hash(self). """
            pass
    
        def __init__(self, seq=()): # known special case of tuple.__init__
            """
            tuple() -> empty tuple
            tuple(iterable) -> tuple initialized from iterable's items
            
            If the argument is a tuple, the return value is the same object.
            # (copied from class doc)
            """
            pass
    
        def __iter__(self, *args, **kwargs): # real signature unknown
            """ Implement iter(self). """
            pass
    
        def __len__(self, *args, **kwargs): # real signature unknown
            """ Return len(self). """
            pass
    
        def __le__(self, *args, **kwargs): # real signature unknown
            """ Return self<=value. """
            pass
    
        def __lt__(self, *args, **kwargs): # real signature unknown
            """ Return self<value. """
            pass
    
        def __mul__(self, *args, **kwargs): # real signature unknown
            """ Return self*value.n """
            pass
    
        @staticmethod # known case of __new__
        def __new__(*args, **kwargs): # real signature unknown
            """ Create and return a new object.  See help(type) for accurate signature. """
            pass
    
        def __ne__(self, *args, **kwargs): # real signature unknown
            """ Return self!=value. """
            pass
    
        def __repr__(self, *args, **kwargs): # real signature unknown
            """ Return repr(self). """
            pass
    
        def __rmul__(self, *args, **kwargs): # real signature unknown
            """ Return self*value. """
            pass

tuple类

t=tuple([1,2,3])
    print(type(t))#<class 'tuple'>

注意：如果创建一个元素的元组，后面需要加逗号。

2、元组操作

之前说过元组是一种序列，那么序列的所有特性元组都是可以使用的。那么序列有哪些特性呢？

*  索引取值
 *  分片
 *  序列相加
 *  序列乘法
 *  in运算符
 *  序列内建函数

#索引、切片取值
    t=(1,2,3,4,5,)
    print(t[1:3])#(2, 3)
    
    #元组相加
    t=(1,2,3,4,5,)
    t1=('hello',)
    print(t+t1)#(1, 2, 3, 4, 5, 'hello')
    
    #元组乘法
    t=(1,2,3,4,5,)
    print(t*2)#(1, 2, 3, 4, 5, 1, 2, 3, 4, 5)
    
    #in运算符
    t=(1,2,3,4,5,)
    print(3 in t)#True
    
    #内建函数
    t=(1,2,3,4,5,)
    print(len(t))#5
    print(min(t))#1
    print(max(t))#5

转载于:https://www.cnblogs.com/shenjianping/p/11002139.html

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