For example if you have the following dictionary:
{1:2, 2:3}
I want to get the following list:
[1, 1, 2, 2, 2]
That is: there are as many "1" as values indicates the value of the key "1" (2) and as many "2" as values indicates the value of the key "2" (3).
One way could be the following:
d = {1:2,2:3}
l=[]
map(l.extend, ([k]*d[k] for k in d))
print(l)
[1, 1, 2, 2, 2]
([k]*d[k] for k in d) is a generating expression that generates a set
of lists, each one has the value of each key of the dictionary repeated by the value of said key, that is to say: [[1, 1], [2, 2, 2]] . Transforming this into a flat list is as simple as applying to each sublist the extend of an empty list.