Python – 根据自定义排序对单项字典列表进行排序
给定单项字典列表和键排序列表，根据自定义键执行字典排序。
Input : test_list1 = [{‘is’ : 4}, {“Gfg” : 10}, {“Best” : 1}], test_list2 = [“Gfg”, “is”, “Best”]
Output : [{‘Gfg’: 10}, {‘is’: 4}, {‘Best’: 1}]
Explanation : By list ordering, dictionaries list get sorted.
Input : test_list1 = [{“Gfg” : 10}, {‘is’ : 4}, {“Best” : 1}], test_list2 = [“Gfg”, “is”, “Best”]
Output : [{‘Gfg’: 10}, {‘is’: 4}, {‘Best’: 1}]
Explanation : Already ordered. No reordering required.
方法 #1：使用 sorted() + index() + keys() + lambda
上述功能的组合可以用来解决这个问题。在此，我们使用 sorted() 进行排序，index() 用于从自定义列表中获取排序，keys() 用于从字典中提取键。
Python3
# Python3 code to demonstrate working of
# Sort list of Single Item dictionaries according to custom ordering
# Using sorted() + index() + keys() + lambda
# initializing lists
test_list1 = [{'is' : 4}, {'for' : 7}, {"Gfg" : 10}, {"Best" : 1}, {"CS" : 8}]
test_list2 = ["Gfg", "is", "Best", "for", "CS"]
# printing original lists
print("The original list 1 is : " + str(test_list1))
print("The original list 2 is : " + str(test_list2))
# sorted() used to perform sort(), returns the result
# to other variable, ordering handled using index() from order list
res = sorted(test_list1, key = lambda ele: test_list2.index(list(ele.keys())[0]))
# printing result
print("The custom order list : " + str(res))Python3
# Python3 code to demonstrate working of
# Sort list of Single Item dictionaries according to custom ordering
# Using sort() + index() + keys() + lambda
# initializing lists
test_list1 = [{'is' : 4}, {'for' : 7}, {"Gfg" : 10}, {"Best" : 1}, {"CS" : 8}]
test_list2 = ["Gfg", "is", "Best", "for", "CS"]
# printing original lists
print("The original list 1 is : " + str(test_list1))
print("The original list 2 is : " + str(test_list2))
# sort() used to perform inplace sort
test_list1.sort(key = lambda ele: test_list2.index(list(ele.keys())[0]))
# printing result
print("The custom order list : " + str(test_list1))The original list 1 is : [{‘is’: 4}, {‘for’: 7}, {‘Gfg’: 10}, {‘Best’: 1}, {‘CS’: 8}]
The original list 2 is : [‘Gfg’, ‘is’, ‘Best’, ‘for’, ‘CS’]
The custom order list : [{‘Gfg’: 10}, {‘is’: 4}, {‘Best’: 1}, {‘for’: 7}, {‘CS’: 8}]
方法 #2：使用 sort() + index() + keys() + lambda
这是可以执行此任务的另一种方式。在此，我们使用 sort() 执行排序任务，执行就地排序，其他结构保持不变。
Python3
# Python3 code to demonstrate working of
# Sort list of Single Item dictionaries according to custom ordering
# Using sort() + index() + keys() + lambda
# initializing lists
test_list1 = [{'is' : 4}, {'for' : 7}, {"Gfg" : 10}, {"Best" : 1}, {"CS" : 8}]
test_list2 = ["Gfg", "is", "Best", "for", "CS"]
# printing original lists
print("The original list 1 is : " + str(test_list1))
print("The original list 2 is : " + str(test_list2))
# sort() used to perform inplace sort
test_list1.sort(key = lambda ele: test_list2.index(list(ele.keys())[0]))
# printing result
print("The custom order list : " + str(test_list1))
The original list 1 is : [{‘is’: 4}, {‘for’: 7}, {‘Gfg’: 10}, {‘Best’: 1}, {‘CS’: 8}]
The original list 2 is : [‘Gfg’, ‘is’, ‘Best’, ‘for’, ‘CS’]
The custom order list : [{‘Gfg’: 10}, {‘is’: 4}, {‘Best’: 1}, {‘for’: 7}, {‘CS’: 8}]