使用Python中的元组或列表对dict进行排序

Question

How can I sort dict keys using a tuple or a list and than return values? For example, I have a dict:

d = {'a' : 1, 'b' : 3, 'c' : 5, d : '7'}

and a tuple:

t = ('d', 'b', 'c', 'a')

I would like to get a list of values, like:

[7, 3, 5, 1]

Many thanks!

Answer 1

You can use a list comprehension:

>>> [d[k] for k in t]
['7', 3, 5, 1]

or map :

>>> map(d.get, t)
['7', 3, 5, 1]

You can also create an OrderedDict using the items in t :

>>> from collections import OrderedDict
>>> dic = OrderedDict((k, d[k]) for k in t)
>>> dic.values()
['7', 3, 5, 1]