一.基本數(shù)據(jù)類(lèi)型
整數(shù)：int
字符串：str(注：/t等于一個(gè)tab鍵)
布爾值： bool
列表：list
列表用[]
元祖：tuple
元祖用（）
字典：dict
注：所有的數(shù)據(jù)類(lèi)型都存在想對(duì)應(yīng)的類(lèi)列里，元祖和列表功能一樣，列表可以修改，元祖不能修改。
二.列表所有數(shù)據(jù)類(lèi)型：
基本操作：
索引，切片，長(zhǎng)度，包含，循環(huán)
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 """ （T.count(價(jià)值)- >整數(shù),返回值的出現(xiàn)次數(shù)） 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. """ （T。指數(shù)(價(jià)值,[開(kāi)始,[不要]])- >整數(shù),返回第一索引值。提出了ValueError如果不存在的價(jià)值。） 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
三.所有元祖數(shù)據(jù)類(lèi)型舉例
#count 用于計(jì)算元素出現(xiàn)的個(gè)數(shù)name_tuple = ("zhangyanlin","suoning","nick")print(name_tuple.count('zhangyanlin')) #index獲取指定元素的指定位置name_tuple = ("zhangyanlin","suoning","nick")print(name_tuple.index('zhangyanlin'))四.索引
name_tuple = ("zhangyanlin","suoning","nick")print(name_tuple[1])五.切片
#取出第一位到最后一位減1的元素name_tuple = ("zhangyanlin","suoning","nick")print(name_tuple[0:len(name_tuple)-1])六.總長(zhǎng)度len
#取出最后一位減1的元素name_tuple = ("zhangyanlin","suoning","nick")print(name_tuple[len(name_tuple)-1])七.for循環(huán)
name_tuple = ("zhangyanlin","suoning","nick")for i in name_tuple: print(i)那么使用 tuple 有什么好處呢？
Tuple 比 list 操作速度快。如果您定義了一個(gè)值的常量集，并且唯一要用它做的是不斷地遍歷它，請(qǐng)使用 tuple 代替 list。
如果對(duì)不需要修改的數(shù)據(jù)進(jìn)行 “寫(xiě)保護(hù)”，可以使代碼更安全。使用 tuple 而不是 list 如同擁有一個(gè)隱含的 assert 語(yǔ)句，說(shuō)明這一數(shù)據(jù)是常量。如果必須要改變這些值，則需要執(zhí)行 tuple 到 list 的轉(zhuǎn)換 (需要使用一個(gè)特殊的函數(shù))。
還記得我說(shuō)過(guò) dictionary keys 可以是字符串，整數(shù)和 “其它幾種類(lèi)型”嗎？Tuples 就是這些類(lèi)型之一。Tuples 可以在 dictionary 中被用做 key，但是 list 不行。實(shí)際上，事情要比這更復(fù)雜。Dictionary key 必須是不可變的。Tuple 本身是不可改變的，但是如果您有一個(gè) list 的 tuple，那就認(rèn)為是可變的了，用做 dictionary key 就是不安全的。只有字符串、整數(shù)或其它對(duì) dictionary 安全的 tuple 才可以用作 dictionary key。
Tuples 可以用在字符串格式化中，我們會(huì)很快看到。
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