python - 根据列表中值的顺序对键进行排序

Question

在 Python 中，我有一个字典，并希望它根据与字典中存储在列表中的键匹配的值的顺序进行排序。假设如下：

value_dict = {"Alpha": "The Alpha", "Beta": "The Beta", "Gamma": "The Gamma"}
key_order = ["Beta", "Gamma", "Alpha"]

所以在这种情况下，我希望对字典进行排序，以便键“Beta”首先出现，然后是“Gamma”，然后是“Alpha”。

有什么好主意我会怎么做？

标签： pythonsortingdictionary

Answer 1

使用OrderedDict

value_dict = {"Alpha": "The Alpha", "Beta": "The Beta", "Gamma": "The Gamma"}
key_order = ["Beta", "Gamma", "Alpha"]

# OrderedDict will keep the sequence intact
from collections import OrderedDict
OrderedDict(zip(key_order, [value_dict[i] for i in key_order]))

# OrderedDict([('Beta', 'The Beta'),
#              ('Gamma', 'The Gamma'),
#              ('Alpha', 'The Alpha')])