Python中如何将字典中key和value值进行互换操作呢

#maomao365.com
#Python 字典之key和value互换的示例分享

dictTmp={
    
    "one":8,"two":"maomao","three":"猫猫小屋"}
dictTmp_1={
    
    }
dictTmp_2={
    
    }
dictTmp_3={
    
    }

#方式1
for key,val in dictTmp.items():
    dictTmp_1[val]=key

#方式2
  
dictTmp_2=dict([val,key] for key,val in dictTmp.items())

#方式3 zip运算符

dictTmp_3=dict(zip(dictTmp.values(),dictTmp.keys()))

print(dictTmp_1)
print(dictTmp_2)
print(dictTmp_3)

//输出
{
    
    8: 'one', 'maomao': 'two', '猫猫小屋': 'three'}
{
    
    8: 'one', 'maomao': 'two', '猫猫小屋': 'three'}
{
    
    8: 'one', 'maomao': 'two', '猫猫小屋': 'three'}


def swap_key_value(old_dict):
   new_dict = {
    
    key:value for value,key in old_dict.items()}
   return new_dict