在Python中按值对字典列表进行排序的方法
这里给出了一个字典，我们的任务是按它们的值排序。该词典中存在两个值，一个是name，另一个是roll。首先，我们使用lambda函数和内置的排序函数按其滚动显示排序列表。
第二，我们按名称和滚动显示排序列表，第三，按其名称显示。
范例程式码
# Initializing list of dictionaries
my_list1 = [{ "name" : "Adwaita", "roll" : 100},
{ "name" : "Aadrika", "roll" : 234 },
{ "name" : "Sakya" , "roll" : 23 }]
print ("The list is sorted by roll: ")
print (sorted(my_list1, key = lambda i: i['roll']) )
print ("\r")
print ("The list is sorted by name and roll: ")
print (sorted(my_list1, key = lambda i: (i['roll'], i['name'])) )
print ("\r")
print ("The list is sorted by roll in descending order: ")
print (sorted(my_list1, key = lambda i: i['roll'],reverse=True) )输出结果
The list is sorted by roll:
[{'name': 'Sakya', 'roll': 23}, {'name': 'Adwaita', 'roll': 100}, {'name': 'Aadrika', 'roll': 234}]
The list is sorted by name and roll:
[{'name': 'Sakya', 'roll': 23}, {'name': 'Adwaita', 'roll': 100}, {'name': 'Aadrika', 'roll': 234}]
The list is sorted by roll in descending order:
[{'name': 'Aadrika', 'roll': 234}, {'name': 'Adwaita', 'roll': 100}, {'name': 'Sakya', 'roll': 23}]