元组与列表一样，都是序列。但元组不能修改内容（列表允许）

默认的，元组通过圆括号括起来

1. 使用type函数查看类型

numbers = (1,2,3,4,5,6,7,8,9,0) print(type(numbers))

2. tuple 函数

tuple 函数的功能与list函数基本一样：以一个序列作为参数并把它转换为元组。

AAA = [1,2,3,4,5] print (type(AAA)) BBB = tuple(AAA) print (type(BBB))

元组的基本操作

同其他序列(如：索引，分片，相加，相乘)

1.索引

CCC = (11,22,33,44,55,66,77,88) print (CCC[0]) print (CCC[4]) print (CCC[-1])

注：使用负数索引，python会从右边开始计算。最后一个元素的位置编号是-1

2.分片

DDDD = (12,222,112,333,44,1234,11111,1,33,455,66667,87787) print (DDDD[3:6]) # 获取第4个到第6个元素 print (DDDD[-3:]) # 获取最好三个元素 print (DDDD[:3]) # 获取前三个元素 print (DDDD[0:10:2]) # 步长为2分片 print (DDDD[::4]) # 步长为4分片 print (DDDD[::-1]) # 从右到左提取元素

3.序列相加

EE = (2,3,4,5,6) FF = (11,33,32,88,90) print (EE+FF)

4.序列相乘

GG = ("I","LOVE","PYTHON","~")print (GG*5) HH = (12,23,34,56,78) print (HH*5)

注：元组的内容不能修改

5.统计元素出现次数count函数

HH = (12,22,33,33,44,44,44,55,12) print (HH.count(12)) print (HH.count(44))

元组tuple官方文档解析

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