rootninja

Sometimes a dictionary is nice for keeping things simple. You can directly access any value by looking at the key. But perhaps you need to split the dictionary up into two lists. Or go the other way; turn two related lists into a key-value dictionary.

Dictionary to Lists

Given a dictionary:

d = {}
d[a] = "1"
d[b] = "2"
d[c] = "3"

Split it into two lists:

alpha = []
numeric = []

Method #1

for key, value in .items():
    alpha.append(key)
    numeric.append(value)

Method #2

for key in d:
    alpha.append(key)
    numeric.append(d[key])

Lists to Dictionary

Going back to a dictionary is even easier.

newdict = dict(zip(alpha, numeric)