Python - 组合两个字典，具有第一个字典的键和第二个字典的值

给出两本词典。任务是以这样一种方式合并它们，即生成的字典包含来自第一个字典的键和来自第二个字典的值。

例子：

Input : test_dict1 = {“Gfg” : 20, “is” : 36, “best” : 100}, test_dict2 = {“Gfg2” : 26, “is2” : 20, “best2” : 70} 
Output : {‘Gfg’: 26, ‘is’: 20, ‘best’: 70} 
Explanation : Similar index keys’ values assigned to dictionary 1.

Input : test_dict1 = {“Gfg” : 20, “best” : 100}, test_dict2 = {“Gfg2” : 26, “best2” : 70} 
Output : {‘Gfg’: 26, ‘best’: 70} 
Explanation : Similar index keys’ values assigned to dictionary 1. 

方法#1：使用循环+keys()

这是可以执行此任务的一种方式。在这里，我们使用 keys() 提取所有键，然后在循环内分配所需的值。

Python3

# Python3 code to demonstrate working of 
# Assign similar index values in Dictionary
# Using loop + keys()
  
# initializing dictionaries
test_dict1 = {"Gfg" : 20, "is" : 36, "best" : 100}
test_dict2 = {"Gfg2" : 26, "is2" : 19, "best2" : 70}
  
# printing original dictionaries
print("The original dictionary 1 is : " + str(test_dict1))
print("The original dictionary 2 is : " + str(test_dict2))
  
# extracting keys and values
keys1 = list(test_dict1.keys())
vals2 = list(test_dict2.values())
  
# assigning new values 
res = dict()
for idx in range(len(keys1)):
    res[keys1[idx]] = vals2[idx]
      
# printing result 
print("Mapped dictionary : " + str(res))

输出

The original dictionary 1 is : {‘Gfg’: 20, ‘is’: 36, ‘best’: 100}
The original dictionary 2 is : {‘Gfg2’: 26, ‘is2’: 19, ‘best2’: 70}
Mapped dictionary : {‘Gfg’: 26, ‘is’: 19, ‘best’: 70}

方法#2：使用 zip() + values()

这是可以执行此任务的另一种方式。在这里，我们使用 zip() 执行映射任务，使用 values() 提取值。

蟒蛇3

# Python3 code to demonstrate working of 
# Assign similar index values in Dictionary
# Using zip() + values()
  
# initializing dictionaries
test_dict1 = {"Gfg" : 20, "is" : 36, "best" : 100}
test_dict2 = {"Gfg2" : 26, "is2" : 19, "best2" : 70}
  
# printing original dictionaries
print("The original dictionary 1 is : " + str(test_dict1))
print("The original dictionary 2 is : " + str(test_dict2))
  
# using zip() to perform required dict. mapping 
res = dict(zip(test_dict1, test_dict2.values()))
      
# printing result 
print("Mapped dictionary : " + str(res)) 

输出

The original dictionary 1 is : {‘Gfg’: 20, ‘is’: 36, ‘best’: 100}
The original dictionary 2 is : {‘Gfg2’: 26, ‘is2’: 19, ‘best2’: 70}
Mapped dictionary : {‘Gfg’: 26, ‘is’: 19, ‘best’: 70}