Python – join list of lists in python

python

Is the a short syntax for joining a list of lists into a single list( or iterator) in python?

For example I have a list as follows and I want to iterate over a,b and c.

x = [["a","b"], ["c"]]

The best I can come up with is as follows.

result = []
[ result.extend(el) for el in x] 

for el in result:
  print el

Best Answer

import itertools
a = [['a','b'], ['c']]
print(list(itertools.chain.from_iterable(a)))