如何对嵌套的Python字典进行排序？
如果您有以下格式的字典：
{
'KEY1':{'name':'foo','data':1351,'completed':100},
'KEY2':{'name':'bar','data':1541,'completed':12},
'KEY3':{'name':'baz','data':58413,'completed':18}
}而且，您想要按升序对每个条目中完成的键进行排序，则可以将排序函数与lambda一起使用，该lambda指定用于对数据进行排序的键。例如，
my_collection = {
'KEY1':{'name':'foo','data':1351,'completed':100},
'KEY2':{'name':'bar','data':1541,'completed':12},
'KEY3':{'name':'baz','data':58413,'completed':18}
}
sorted_keys = sorted(my_collection, key=lambda x: (my_collection[x]['completed']))
print(sorted_keys)这将给出输出：
['KEY2', 'KEY3', 'KEY1']