How to set a dict value using another key of the same dict [duplicate]

Question

I want to do something like this:

my_dict = {"key": "value", "key1": "value1", "key2": my_dict["key"]}

and have the result be:

{"key": "value", "key1": "value1", "key2": "value"}

Currently getting unresolved reference unless I declare the dict() prior. Otherwise I get a key error.

Answer 1

Set the value of key2 to something phony (say, None), initialize my_dict properly, and then change the value of my_dict['key2'] to my_dict["key"].