Python list of tuples, need to unpack and clean up

Question

Assume you have a list such as

x = [(\'Edgar\',), (\'Robert\',)]

What would be the most efficient way to get to just the strings \'Edgar\

Answer 1

This is pretty straightforward with a list comprehension:

x = [('Edgar',), ('Robert',)]
y = [s for t in x for s in t]

This does the same thing as list(itertools.chain.from_iterable(x)) and is equivalent in behavior to the following code:

y = []
for t in x:
    for s in t:
        y.append(s)