Andrade Andrade - 1 month ago 6
Python Question

Python: How to split a string into multiple value spaces in a dictionary

I am starting out with a file in this format:

a ; b
b ; c
c ; d,e


and I need to end up with a dictionary where the keys are from the left-hand side of the arrows and the values are from the right-hand side; AND if there are multiple letters on the right-hand side, they go into MULTIPLE values in the dictionary.

This is my current code:

cleanup = [part for part in [entry.replace('\n','') for entry in myFile]]
lefts = [part[0] for part in [entry.split(' ; ') for entry in cleanup]]
rights = [part[1] for part in [entry.split(' ; ') for entry in cleanup]]



myDict = defaultdict(list)

for left, right in zip(lefts, rights):
myDict[left].append(right)


and my current result:

myDict = {'a': ['b'], 'b': ['c'], 'c': ['d,e']}


which is clearly not what I want -- I need d and e to be in SEPARATE value spaces, but associated with one key, c.

Thank you in advance.

Answer

You are very close. What you should do is when you take your right side, split that on comma. So now you should have a list with those individual items:

['d', 'e']

Then, instead of using append, use extend:

for left, right in zip(lefts, rights):
    myDict[left].extend(right.split(',')