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Python常见数据类型转换操作示例

更新时间:2020-07-02 02:54:01 作者:startmvc
本文实例讲述了Python常见数据类型转换操作。分享给大家供大家参考,具体如下:类型转换

本文实例讲述了Python常见数据类型转换操作。分享给大家供大家参考,具体如下:

类型转换

主要针对几种存储工具:list、tuple、dict、set

特殊之处:dict是用来存储键值对的。

1、list 转换为set


l1 = [1, 2, 4, 5]
s1 = set(l1)
print(type(s1))
print(s1)

输出:

<class 'set'> {1, 2, 4, 5}

2、set转换为list


s1 = set([1, 2, 3, 4])
l1 = list(s1)
print(type(l1))
print(l1)

输出:

<class 'list'> [1, 2, 3, 4]

3、tuple 转换为set


t1 = (1, 2, 3, 4)
s1 = set(t1)
print(type(s1))
print(s1)

输出:

<class 'set'> {1, 2, 3, 4}

4、set转换为tuple


s1 = set([1, 2, 3, 4])
t1 = tuple(s1)
print(type(t1))
print(t1)

输出:

<class 'tuple'> (1, 2, 3, 4)

5、list转tuple


l1 = [1, 2, 4, 5]
t1 = tuple(l1)
print(type(t1))
print(t1)

输出:

<class 'tuple'> (1, 2, 4, 5)

6、tuple转list


t1 = (1, 2, 3, 4)
l1 = list(t1)
print(type(l1))
print(l1)

输出:

<class 'list'> [1, 2, 3, 4]

7、list转dict


list1=[('a',1),('b',2),('c',3)]
dict1={k:v for k,v in list1}
dict2={v:k for k,v in list1}
print(dict1)
print(dict2)

输出:

{'a': 1, 'b': 2, 'c': 3} {1: 'a', 2: 'b', 3: 'c'}

Python 数据类型 转换