从具有 K 值的两个列表中呈现字典的Python程序

给定两个列表，一个用于为字典提供键，另一个用于提供值。以下程序从第二个列表中获取 K 个值并将其分配给每个键，创建以下类型的字典：

Input : test_list = [“gfg”, “best”], val_list = [1, 4, 5, 6, 7, 8, 8, 5], K = 4 
Output : {‘gfg’: [1, 4, 5, 6], ‘best’: [7, 8, 8, 5]} 
Explanation : Equal elements paired to each key.
Input : test_list = [“gfg”], val_list = [1, 4, 5, 6], K = 4 
Output : {‘gfg’: [1, 4, 5, 6]} 
Explanation : All elements assigned to only key. 

方法：使用循环和切片 

Python3

from collections import defaultdict
 
# initializing list
test_list = ["gfg", "is", "best", "good"]
 
# printing original list
print("The original list is : " + str(test_list))
 
# initializing values list
val_list = [1, 4, 5, 6, 7, 8, 8, 5, 4]
 
# initializing K
K = 2
 
# work list
val_list = val_list[:(len(test_list) * K)]
 
# gets required dictionary list
res = defaultdict(list)
key_cnt = 0
for idx in range(0, len(val_list)):
     
    # append values to required keys   
    res[test_list[key_cnt]].append(val_list[idx])
     
    # increment keys when K
    if (idx + 1) % K == 0:
        key_cnt += 1
 
# printing result
print("The constructed dictionary : " + str(dict(res)))

输出：

 The original list is : [‘gfg’, ‘is’, ‘best’, ‘good’]

The constructed dictionary : {‘gfg’: [1, 4], ‘is’: [5, 6], ‘best’: [7, 8], ‘good’: [8, 5]}