python 中实现字典的项按照字典的键进行排序

 

001、

>>> test1 = dict(c = 200, a = 400, d = 300, b = 700)
>>> test1
{'c': 200, 'a': 400, 'd': 300, 'b': 700}
>>> test2 = {}
>>> temp = []
>>> for i in test1:
...     temp.append(i)
...
>>> temp
['c', 'a', 'd', 'b']
>>> temp.sort()                 ## 对字典的键进行排序
>>> temp
['a', 'b', 'c', 'd']
>>> for i in temp:
...     test2[i] = test1[i]    ## 按照排序后的键输出字典
...
>>> test2
{'a': 400, 'b': 700, 'c': 200, 'd': 300}