Python – 在字典列表中添加自定义值键
给定一个字典列表、自定义列表和键，将键按顺序添加到每个字典的列表值。
Input : test_list = [{“Gfg” : 6, “is” : 9, “best” : 10}, {“Gfg” : 8, “is” : 11, “best” : 19}, {“Gfg” : 2, “is” : 16, “best” : 10}], K = “Geeks”, append_list = [6, 7, 4]
Output : [{“Gfg” : 6, “is” : 9, “best” : 10, “Geeks” : 6}, {“Gfg” : 8, “is” : 11, “best” : 19, “Geeks” : 7}, {“Gfg” : 2, “is” : 16, “best” : 10, “Geeks” : 4}]
Explanation : “Geeks” key added in each dictionary.
Input : test_list = [{“Gfg” : 6, “is” : 9, “best” : 10}], K = “CS”, append_list = [6]
Output : [{“Gfg” : 6, “is” : 9, “best” : 10, “CS” : 6}]
Explanation : “CS” key added in each dictionary with 6 as value.
方法 #1：使用循环 + enumerate()
这是可以执行此任务的方式之一。在此，我们使用 enumerate() 遍历字典以获取索引，并使用其索引值继续分配给每个字典键。
Python3
# Python3 code to demonstrate working of
# Add custom values key in List of dictionaries
# Using loop
# initializing lists
test_list = [{"Gfg" : 6, "is" : 9, "best" : 10},
{"Gfg" : 8, "is" : 11, "best" : 19},
{"Gfg" : 2, "is" : 16, "best" : 10},
{"Gfg" : 12, "is" : 1, "best" : 8},
{"Gfg" : 22, "is" : 6, "best" : 8}]
# printing original list
print("The original list : " + str(test_list))
# initializing Key
K = "CS"
# initializing list
append_list = [6, 7, 4, 3, 9]
# using enumerate() to iterate for index and values
for idx, ele in enumerate(test_list):
ele[K] = append_list[idx]
# printing result
print("The dictionary list after addition : " + str(test_list))Python3
# Python3 code to demonstrate working of
# Add custom values key in List of dictionaries
# Using zip() + loop
# initializing lists
test_list = [{"Gfg" : 6, "is" : 9, "best" : 10},
{"Gfg" : 8, "is" : 11, "best" : 19},
{"Gfg" : 2, "is" : 16, "best" : 10},
{"Gfg" : 12, "is" : 1, "best" : 8},
{"Gfg" : 22, "is" : 6, "best" : 8}]
# printing original list
print("The original list : " + str(test_list))
# initializing Key
K = "CS"
# initializing list
append_list = [6, 7, 4, 3, 9]
# zip() used to bind index wise
# list and dictionary
for dic, lis in zip(test_list, append_list):
dic[K] = lis
# printing result
print("The dictionary list after addition : " + str(test_list))The original list : [{'Gfg': 6, 'is': 9, 'best': 10}, {'Gfg': 8, 'is': 11, 'best': 19}, {'Gfg': 2, 'is': 16, 'best': 10}, {'Gfg': 12, 'is': 1, 'best': 8}, {'Gfg': 22, 'is': 6, 'best': 8}]
The dictionary list after addition : [{'Gfg': 6, 'is': 9, 'best': 10, 'CS': 6}, {'Gfg': 8, 'is': 11, 'best': 19, 'CS': 7}, {'Gfg': 2, 'is': 16, 'best': 10, 'CS': 4}, {'Gfg': 12, 'is': 1, 'best': 8, 'CS': 3}, {'Gfg': 22, 'is': 6, 'best': 8, 'CS': 9}]
方法 #2：使用 zip() + 循环
这是可以执行此任务的另一种方式。在此，我们使用 zip() 执行列表值与每个字典的映射。
Python3
# Python3 code to demonstrate working of
# Add custom values key in List of dictionaries
# Using zip() + loop
# initializing lists
test_list = [{"Gfg" : 6, "is" : 9, "best" : 10},
{"Gfg" : 8, "is" : 11, "best" : 19},
{"Gfg" : 2, "is" : 16, "best" : 10},
{"Gfg" : 12, "is" : 1, "best" : 8},
{"Gfg" : 22, "is" : 6, "best" : 8}]
# printing original list
print("The original list : " + str(test_list))
# initializing Key
K = "CS"
# initializing list
append_list = [6, 7, 4, 3, 9]
# zip() used to bind index wise
# list and dictionary
for dic, lis in zip(test_list, append_list):
dic[K] = lis
# printing result
print("The dictionary list after addition : " + str(test_list))
The original list : [{'Gfg': 6, 'is': 9, 'best': 10}, {'Gfg': 8, 'is': 11, 'best': 19}, {'Gfg': 2, 'is': 16, 'best': 10}, {'Gfg': 12, 'is': 1, 'best': 8}, {'Gfg': 22, 'is': 6, 'best': 8}]
The dictionary list after addition : [{'Gfg': 6, 'is': 9, 'best': 10, 'CS': 6}, {'Gfg': 8, 'is': 11, 'best': 19, 'CS': 7}, {'Gfg': 2, 'is': 16, 'best': 10, 'CS': 4}, {'Gfg': 12, 'is': 1, 'best': 8, 'CS': 3}, {'Gfg': 22, 'is': 6, 'best': 8, 'CS': 9}]