To merge two dictionaries of list in Python

Question

There are two dictionaries

x={1:[\'a\',\'b\',\'c\']}
y={1:[\'d\',\'e\',\'f\'],2:[\'g\']}

I want another dictionary z which is a merged one

Answer 1

You could do this:

final = {}
dicts = [x,y]

for D in dicts:
    for key, value in D:
        final[key] = final.get(key,[]).extend(value)

final.get(key,[]) will get the value in final for that key if it exists, otherwise it'll be an empty list. .extend(value) will extend that list, empty or not, with the corresponding value in D, which is x or y in this case.