python defines function to return multiple values

Custom function:

def 函数名(参数列表):
    函数体
    [return 返回值]   #可以没有返回reuturn  ，也可以返回空 return，

Reprinted in: How to return multiple values ​​from a function in Python - Flame Rabbit (zadmei.com) https://www.zadmei.com/rhcpzdhs.html

 1. Custom functions can return tuples, lists, dictionaries, etc.

2. Tuples and lists can be used to return ordered arrays; dictionaries can be used to return unordered arrays;

3. When returning the dictionary, pay attention to the uniqueness of the key keyword.

4. Return a tuple or list. You can use multiple variables to receive the return value.

Example

1. Use tuples to return multiple values

#自定义函数，返回一个元组
def get_info():
    name = "Tom"
    age = 18
    gender = "male"
    return name, age, gender

info = get_info()
print(info)

name, age, gender = get_info()   #使用多个变量接收元组返回值
print(name, age, gender)

The output is:

('Tom', 18, 'male')
Tom 18 male

In this example, we define a function called get_info, which returns a tuple containing three values: name, age, and gender. Outside the function, we call the function and assign the return value to a variable called info. Finally, we print the value of this variable and get a tuple of three elements.

We also used multiple variables to receive the return value and printed the values ​​of these variables separately.

2. Use a list to return multiple values

#自定义函数，返回一个列表
def get_info():
    name = "Tom"
    age = 18
    gender = "male"
    return [name, age, gender]

info = get_info() #返回列表
print(info)

name, age, gender = get_info() #使用多个变量接收元组返回值
print(name, age, gender)

The output is:

['Tom', 18, 'male']  #print(info)
Tom 18 male

In this example, we define a function called get_info, which returns a list containing three values: name, age, and gender. Outside the function, we call the function and assign the return value to a variable called info. Finally, we print the value of this variable and get a list of three elements.

We also used multiple variables to receive the return value and printed the values ​​of these variables separately.

3. Example 3: Using a dictionary to return multiple values

#自定义函数返回一个字典
def get_info():
    info = {"name": "Tom", "age": 18, "gender": "male"}
    return info

info = get_info()
print(info) #字典

name, age, gender = get_info().values() #多个变量接收返回的字典数据
print(name, age, gender)

The output is:

{'name': 'Tom', 'age': 18, 'gender': 'male'}
Tom 18 male

In this example, we define a function called get_info, which returns a dictionary containing three key-value pairs: name, age, and gender. Outside the function, we call the function and assign the return value to a variable called info. Finally, we print the value of this variable and get a dictionary containing three key-value pairs.

We also used the dictionary's values() method to get the values ​​in the dictionary, used multiple variables to receive the return values, and printed the values ​​of these variables respectively.