Learn Web Development with Python

zip

We've already covered zip in the previous chapters, so let's just define it properly and then I want to show you how you could combine it with map.

According to the Python documentation:

zip(*iterables) returns an iterator of tuples, where the i-th tuple contains the i-th element from each of the argument sequences or iterables. The iterator stops when the shortest input iterable is exhausted. With a single iterable argument, it returns an iterator of 1-tuples. With no arguments, it returns an empty iterator.

Let's see an example:

# zip.grades.py>>> grades = [18, 23, 30, 27]>>> avgs = [22, 21, 29, 24]>>> _(zip(avgs, grades))[(22, 18), (21, 23), (29, 30), (24, 27)]>>> _(map(lambda *a: a, avgs, grades))  # equivalent to zip[(22, 18), (21, ...