Convert list of tuples to list?

Question

How do I convert

[(1,), (2,), (3,)]

to

[1, 2, 3]

Answer 1

In these situations I like to do:

a = [(1,), (2,), (3,)]
new_a = [element for tup in a for element in tup]

This works even if your tuples have more than one element. This is equivalent to doing this:

a = [(1,), (2,), (3,)]
new_a = []
for tup in a:
    for element in tup:
        new_a.append(element)