quickly looping over a 2D array?

[Martin]

Hi,

I am new to python and I was wondering if there was a way to speed up
the way I index 2D arrays when I need to check two arrays
simultaneously? My current implementations is (using numpy) something
like the following...

for i in range(numrows):
    for j in range(numcols):

        if array_1[i, j] == some_value or array_2[i, j] >= array_1[i,
j] * some_other_value
            array_1[i, j] = some_new_value

Many Thanks,

Martin