Converting a list of tuples into a simple flat list [duplicate]

Answer 1

Here is the best way to do it in terms of performance and independence of special modules like itertools:

>>> l = [(1,2), (1,3), (1,4), (1,5), (1,6)] 
>>> reduce(list.__add__,map(list,l))
[1, 2, 1, 3, 1, 4, 1, 5, 1, 6]