Transform “list of tuples” into a flat list or a matrix

Question

With Sqlite, a \"select..from\" command returns the results \"output\", which prints (in python):

>>print output
[(12.2817, 12.2817), (0, 0), (8.52, 8.         


        

Answer 1

In Python 3 you can use the * syntax to flatten a list of iterables:

>>> t = [ (1,2), (3,4), (5,6) ]
>>> t
[(1, 2), (3, 4), (5, 6)]
>>> import itertools
>>> list(itertools.chain(*t))
[1, 2, 3, 4, 5, 6]
>>>