python

zip

zip(iterable1 , iterable2 , ...) returns an iterator.

That iterates over t-uple that are made by elements taken by each of the iterable passed as arguments.

So the first t-uple will be composed by the first element of iterable1, the first element of iterable2 and so on; the second t-uple will be composed by the second element of iterable1, the second element of iterable2 and so on.

Since zip returns an iterator to obtain a list or a dictionary from zip it is necessary to use list(zip(...)) or dict(zip(...)).