Python

【Python】Basics - 函数返回值

Posted by 西维蜀黍 on 2019-10-27, Last Modified on 2024-01-09

Introduction

In Python, you can return multiple values by simply return them separated by commas.

As an example, define a function that returns a string and a number as follows: Just write each value after the return, separated by commas.

def test():
    return 'abc', 100

Return Multiple Values

In Python, comma-separated values are considered tuples without parentheses, except where required by syntax. For this reason, the function in the above example returns a tuple with each value as an element.

The return value is tuple.

result = test()

print(result)
print(type(result))
# ('abc', 100)
# <class 'tuple'>

Each element has a type defined in the function.

print(result[0])
print(type(result[0]))
# abc
# <class 'str'>

print(result[1])
print(type(result[1]))
# 100
# <class 'int'>

Same for 3 or more return values.

def test2():
    return 'abc', 100, [0, 1, 2]

a, b, c = test2()

print(a)
# abc

print(b)
# 100

print(c)
# [0, 1, 2]

Return list

Using [] returns list instead of tuple.

def test_list():
    return ['abc', 100]

result = test_list()

print(result)
print(type(result))
# ['abc', 100]
# <class 'list'>

Reference

FEATURED TAGS
algorithm algorithmproblem architecturalpattern architecture aws c# cachesystem codis concurrentcontrol database dataformat datastructure debug design designpattern distributedsystem django docker domain engineering freebsd git golang grafana hackintosh hadoop hardware hexo http hugo ios iot java javaee javascript kafka kubernetes linux linuxcommand linuxio lock macos markdown microservices mysql nas network networkprogramming nginx node.js npm oop openwrt operatingsystem padavan performance programming prometheus protobuf python redis router security shell software testing spring sql systemdesign truenas ubuntu vmware vpn windows wmware wordpress xml zookeeper
FRIENDS

TOC