If i am getting data in the following format:
[(1, 2), (3, 8)]
I understand that this is basically a list of pair tuples, I basically was thinking what is the most effective way of getting the first value of each tuple. So for the above case I would want to get value [1,3]
Python's list comprehension should do the trick and tuples can be accessed using indices just like lists.
>>> l = [(1, 2), (3, 8)]
>>> [x[0] for x in l]
[1, 3]
Use a list comprehension:
list = [ x[0] for x in values ]
Where values is your list of elements
In your example, to get [1,3] from [(1, 2), (3, 8)]:
>>> a = [(1, 2), (3, 8)]
>>> print [a[0][0], a[1][0]]
[1, 3]
From that, the pattern will be:
>>> [b[0] for b in a]
[1, 3]
