python, split dictionary into list of tuple-CodePudding

dictionary = {1: ['a', 'b'], 2: ['a'], 3: ['b', 'c']}

I want this dictionary to be in list of tuple like this: output:

[(1, 'a'),(1, 'b'),(2, 'a'),(3, 'b'),(3, 'c')]

Please help me out in this!!!

CodePudding user response：

You can do this with a comprehension:

[(x, z) for x, y in dictionary.items() for z in y]

Or expanded out:

out = []
for x, y in dictionary.items():
    for z in y:
        out.append((x, z))

CodePudding user response：

dictionary = {1: ['a', 'b'], 2: ['a'], 3: ['b', 'c']}

list_of_tuples = []
for k,v_list in dictionary.items():
    for v in v_list:
        list_of_tuples.append((k,v))
list_of_tuples