python tuple args_Python基本数据类型之tuple
一、創(chuàng)建元組：
ages = (11, 22, 33, 44, 55)
ages = tuple((11, 22, 33, 44, 55))
元組和列表幾乎一樣
元組的元素不可修改，但是元組元素的元素是可以修改的
tuple(iterable)，可以存放所有可迭代的數(shù)據(jù)類型
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])
循環(huán)
for i in name_tuple:
print(i)
長度
name_tuple = (1,2,3)
print(name_tuple[len(name_tuple)-1])
嵌套
元組的元素不可修改，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、源碼
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):
"""計算元素出現(xiàn)的個數(shù)"""
""" T.count(value) -> integer -- return number of occurrences of value """
return 0
def index(self, value, start=None, stop=None):
"""獲取索引"""
"""
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
總結
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