[EMAIL PROTECTED] wrote:
> Hi all,
> Is there a simple python function to return the list index of the
> minimum entry in a list of lists?
> ie, for [[3,3,3,3], [3,3,3,1], [3,3,3,3]] to return 2,4.
> Or, same question but just for a list of numbers, not a list of lists.
> Thanks,
> Josh
One way to do this is to generate (value, index-in-main-list,
index-in-secondary-list) tuples and then just take the minimum.
def f(L):
'''Return indices of the first minimum value in a list of lists.'''
return min(
(n, i, j)
for i, L2 in enumerate(L)
for j, n in enumerate(L2)
)[1:]
L = [[3, 3, 3, 3], [3, 3, 3, 1], [3, 3, 3, 3]]
print f(L) # prints (1, 3)
Note: In python (and most other languages) indices begin at 0, so your
return values of (2, 4) wouldn't be correct.
For a list of numbers it's simpler.
L = [3, 3, 3, 1, 3, 3]
print min((n, i) for i, n in enumerate(L))[1] # prints 3
Hope this helps
~Simon
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