How to change each keys in a dictionary-CodePudding

Is there any way I can change the keys in a dictionary at once?

For example, mydict={0:0.0, 1:1.1, 2:2.2}.

How can I get newdict={1:0.0, 2:1.1, 0:2.2}?

CodePudding user response：

If you want to do it in Python 3 so you can control the order of keys in mydict, then you could use a pandas Series to help assign new keys to the dictionary values.

import pandas as pd

mydict={0:0.0, 1:1.1, 2:2.2}

new_keys = [1, 2, 0]

# Make dictionary with same values assigned to new keys.
newdict = pd.Series(list(mydict.values()),
                    index=new_keys) \
                .to_dict()
newdict
# {1: 0.0, 2: 1.1, 0: 2.2}