交换python中的dicts列表中的键

Question

I want to swap keys in a dictionary but keep the values the same.

This script will be used to set end of service dates. In essence the release date of the newer version is the end of service date of the older one. I have an ordered dictionary containing the version as a key and the release date as its value. Looking roughly like this:

{'10.1.0: '2019-01-01',
 '9.3.0': '2018-11-02',
 '9.2.0': '2018-06-20',
 '9.1.0': '2018-03-06'}

i want to re-sort the dictionary and basically move the keys up one spot so that the dict will contain the version with the release date of its successor. The latest version can either contain no value or be deleted. My ideal outcome would look like this:

{'9.3.0': '2019-01-01',
 '9.2.0': '2018-11-02',
 '9.1.0': '2018-06-20'}

Answer 1

Try using the below code (this only works for python version >= 3.6):

>>> d = {'10.1.0: ':'2019-01-01',
 '9.3.0': '2018-11-02',
 '9.2.0': '2018-06-20',
 '9.1.0': '2018-03-06'}
>>> dict(zip(list(d)[1:], d.values()))
{'9.3.0': '2019-01-01', '9.2.0': '2018-11-02', '9.1.0': '2018-06-20'}