CODEWITHSUNDEEP
pythondictionarykeyextend
Tom
Tom

Reputation: 1

How to extend an existing key in a dict?

I want to extend an existing key in a dict with an information. The key 'abc' should then be completed with a 'd' so that the result is 'abcd'. Something like this:

info1='abc'
info2='d'
DataDict[info1 '%i' %info2] = DataDict.pop(info1)

but it does not work...

Upvotes: 0

Views: 206

Answers (1)

Prune
Prune

Reputation: 77837

For a dict, this is a contradiction: a different key is entirely a different entry. You can, perhaps, make it a little more readable for your algorithm, but you still have to create a new key and remove the old one.

old_key = "abc"
extension = 'd'
my_dict[old_key + extension] = my_dict[old_key]
del my_dict[old_key]

Depending on your use case, you may want to make a new copy of the old value.

Ah ... I see tha tyou are comfortable with pop. In that case, you were quite close with your (edited) solution:

my_dict[old_key + extension] = my_dict.pop(old_key)

Upvotes: 1

Related Questions