On 05/13/2010 10:45 AM, a wrote:
a=[2,3,3,4,5,6]
i want to know the indices where a==3 (ie 1 and 2)
indexes = [i for (i, v) in enumerate(a) where v==3]
then i want to reference these in a
In a _what_? You can then do things like
for i in indexes:
print a[i]
(but you already know these are "3", so it's not very exciting...)
-tkc
really its to get the indexes in 1 array where something equals
something then reference these in another array.
If your two arrays are of the same length, you can do things like
a = [2,3,3,4,5,6]
b = ['a', 'b', 'c', 'd', 'e', 'f']
print [m for (n,m) in zip(a,b) if n == 3]
and skip the indexes altogether.
-tkc
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