腾讯课堂——基础数据类型(tuple元祖)

初识元祖

标准类型

数字

字符串

列表

字典

元组

 　　定义：与列表类似，只不过［］改成（）

　　特性：

　　　　1.可存放多个值
　　　　2.不可变
　　　　3.按照从左到右的顺序定义元组元素，下标从0开始顺序访问，有序

元祖的创建

　　ages = (11, 22, 33, 44, 55)
　　或
　　ages = tuple((11, 22, 33, 44, 55))
　　顺序及下标图示

元祖的常用操作

　　索引

　　切片　　

　　循环

　　长度

　　包含

元祖的特性详解

　　1.可存放多个值

　　　　如果元祖中只有一个值

t = (1,)
t = (1)   #<==>t = 1

　　　　元祖中不仅可以存放数字、字符串，还可以存放更加复杂的数据类型

　　2.不可变 

　　　　元祖本身不可变，如果元祖中还包含其他可变元素，这些可变元素可以改变

元祖相关知识拾遗

　　字典中遇到的tuple

 　　1.字典的定义

　　　　元祖可以作为字典的key：

dic = {('alex','male'):'v1',('wusir','male'):'v2'}
print(dic)

 　　　　字典定义可以用到元祖：

person = dict((['name','苑昊'],['文周',18]))
person = dict((('name','苑昊'),('文周',18)))
print(person)

 　　2.字典的items方法，将字典中的每一项作为元祖返回

dic = {'k1':'v1','k2':'v2'}
print(dic.items())
#dict_items([('k1', 'v1'), ('k2', 'v2')])

　　　　再讲循环

dic = {'key1':'value1','key2':'value2'}
for key,value in dic.items():
    print(key,value)

元祖的工厂函数

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.
</span><span style="color: #800000;">"""</span>
<span style="color: #0000ff;">def</span> count(self, value): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown; restored from __doc__</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> T.count(value) -&gt; integer -- return number of occurrences of value </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">return</span><span style="color: #000000;"> 0

</span><span style="color: #0000ff;">def</span> index(self, value, start=None, stop=None): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown; restored from __doc__</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;">
    T.index(value, [start, [stop]]) -&gt; integer -- return first index of value.
    Raises ValueError if the value is not present.
    </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">return</span><span style="color: #000000;"> 0

</span><span style="color: #0000ff;">def</span> <span style="color: #800080;">__add__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return self+value. </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__contains__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return key in self. </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__eq__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return self==value. </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__getattribute__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return getattr(self, name). </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__getitem__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return self[key]. </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__getnewargs__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__ge__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return self&gt;=value. </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__gt__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return self&gt;value. </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__hash__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return hash(self). </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__init__</span>(self, seq=()): <span style="color: #008000;">#</span><span style="color: #008000;"> known special case of tuple.__init__</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;">
    tuple() -&gt; empty tuple
    tuple(iterable) -&gt; tuple initialized from iterable's items
    
    If the argument is a tuple, the return value is the same object.
    # (copied from class doc)
    </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__iter__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Implement iter(self). </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__len__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return len(self). </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__le__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return self&lt;=value. </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__lt__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return self&lt;value. </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__mul__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return self*value.n </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span><span style="color: #000000;">

@staticmethod </span><span style="color: #008000;">#</span><span style="color: #008000;"> known case of __new__</span>
<span style="color: #0000ff;">def</span> <span style="color: #800080;">__new__</span>(*args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Create and return a new object.  See help(type) for accurate signature. </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__ne__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return self!=value. </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__repr__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return repr(self). </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span>

<span style="color: #0000ff;">def</span> <span style="color: #800080;">__rmul__</span>(self, *args, **kwargs): <span style="color: #008000;">#</span><span style="color: #008000;"> real signature unknown</span>
    <span style="color: #800000;">"""</span><span style="color: #800000;"> Return self*value. </span><span style="color: #800000;">"""</span>
    <span style="color: #0000ff;">pass</span></pre>