Hi all,
I've got a simple problem but it's defeated me and I was wondering if
somebody could point out where I'm going wrong or offer an alternative
solution to the problem?
I have a list of lists such as [[a,2,3,4],[b,10,11,12], [a,2,3,4]]. I
need to combine the two lists that have the same first character in
this example 'a'. In reality there are 656 lists within the list.
My attempt so far is:
L = [[a,2,3,4],[b,10,11,12], [a,2,3,4]]
d = []
z = 1
while z <= len(L):
for a in L:
if L.count(a[0]) > 1:
d.append(a[2:])
summed = [sum(pair) for pair in zip(d[0], d[1])]
z = z+1
print summed
Any pointers more than welcome.
Thanks all.
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