一、创建元组：

ages = (11, 22, 33, 44, 55)

ages = tuple((11, 22, 33, 44, 55))

元组和列表几乎一样

元组的元素不可修改，但是元组元素的元素是可以修改的

tuple(iterable)，可以存放所有可迭代的数据类型

二、基本操作：

索引

name_tuple = (1,2,3)

print(name_tuple[0])

切片

name_tuple = (1,2,3)

print(name_tuple[0:2])

循环

for i in name_tuple:

print(i)

长度

name_tuple = (1,2,3)

print(name_tuple[len(name_tuple)-1])

嵌套

元组的元素不可修改，但是元素的元素可以修改

t = (11,22,["alex",{"k1":"v1"}])

temp = t[2][1]['k1']

print(temp)

三、源码

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):

"""计算元素出现的个数"""

""" T.count(value) -> integer -- return number of occurrences of value """

return 0

def index(self, value, start=None, stop=None):

"""获取索引"""

"""

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):

""" Return self+value. """

pass

def __contains__(self, *args, **kwargs):

""" Return key in self. """

pass

def __eq__(self, *args, **kwargs):

""" Return self==value. """

pass

def __getattribute__(self, *args, **kwargs):

""" Return getattr(self, name). """

pass

def __getitem__(self, *args, **kwargs):

""" Return self[key]. """

pass

def __getnewargs__(self, *args, **kwargs):

pass

def __ge__(self, *args, **kwargs):

""" Return self>=value. """

pass

def __gt__(self, *args, **kwargs):

""" Return self>value. """

pass

def __hash__(self, *args, **kwargs):

""" 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):

""" Implement iter(self). """

pass

def __len__(self, *args, **kwargs):

""" Return len(self). """

pass

def __le__(self, *args, **kwargs):

""" Return self<=value. """

pass

def __lt__(self, *args, **kwargs):

""" Return self

pass

def __mul__(self, *args, **kwargs):

""" Return self*value.n """

pass

@staticmethod # known case of __new__

def __new__(*args, **kwargs):

""" Create and return a new object. See help(type) for accurate signature. """

pass

def __ne__(self, *args, **kwargs):

""" Return self!=value. """

pass

def __repr__(self, *args, **kwargs):

""" Return repr(self). """

pass

def __rmul__(self, *args, **kwargs):

""" Return self*value. """

pass