1.拆包、交换变量的值

<1> 对返回的数据直接拆包

def get_my_info():
    high = 178
    weight = 100
    age = 18
    return high, weight, age


# result = get_my_info()
# print(result)

my_high, my_weight, my_age = get_my_info()
print(my_high)
print(my_weight)
print(my_age)

  

 

  
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总结：

• 拆包时要注意，需要拆的数据的个数要与变量的个数相同，否则程序会异常
• 除了对元组拆包之外，还可以对列表、字典等拆包

  In [17]: a, b = (11, 22)
  In [18]: a
  Out[18]: 11
  In [19]: b
  Out[19]: 22

  In [20]: a, b = [11, 22]
  In [21]: a
  Out[21]: 11
  In [22]: b
  Out[22]: 22

  In [23]: a, b = {"m":11, "n":22}  # 取出来的是key，而不是键值对
  In [24]: a
  Out[24]: 'm'
  In [25]: b
  Out[25]: 'n'

  

 

  
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<2> 交换2个变量的值

# 第1种方式
# a = 4
# b = 5
# c = 0
#
# c = a
# a = b
# b = c
#
# print(a)
# print(b)

# 第2种方式
# a = 4
# b = 5
# a = a+b  # a=9, b=5
# b = a-b  # a=9, b=4
# a = a-b  # a=5, b=4
# print(a)
# print(b)

# 第3种方式
a, b = 4, 5
a, b = b, a

print(a)
print(b)

  

 

  
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文章来源: codeboy.blog.csdn.net，作者：愚公搬代码，版权归原作者所有，如需转载，请联系作者。

原文链接：codeboy.blog.csdn.net/article/details/115048671