CODEWITHSUNDEEP
pythonlistdictionary
scooterdude32
scooterdude32

Reputation: 75

Splitting lists to make dictionary python

I am fairly new at programming and I'm trying to practice making lists and dictionaries. I have a list that contains numbers and letters separated by a colon

lst = ['1:A', '2:B', '3:C', '4:A']

and I want to make a dictionary that looks like this

dictionary = {'1':'A', '2':'B', '3':'B', '4':'A'}

so that the key matches the number and the value matches the letter. I thought I could just make a nested list or something but I just couldn't get it to work. What is the best way to turn this type of list into a dictionary as stated?

Upvotes: 1

Views: 59

Answers (1)

Martijn Pieters
Martijn Pieters

Reputation: 1121972

Use the dict() constructor with a generator expression:

dict(v.split(':') for v in lst)

This works because dict() accepts a sequence of (key, value) pairs as input; each str.split() call produces these from the elements in your list.

Demo:

>>> lst = ['1:A', '2:B', '3:C', '4:A']
>>> dict(v.split(':') for v in lst)
{'1': 'A', '3': 'C', '2': 'B', '4': 'A'}

Upvotes: 5

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