Atirag - 1 year ago 93
Python Question

# Python list of lists to divide an element position on all sublists by a number

How can in python take a lists of lists and apply a division to the third element of each sublist.

The sublists looks like this

``````[1.3735876284e-05, 0.9277849431216683, 34.02875434027778, 0.0]
[2.60440773e-06,   7.35174234e-01,   2.79259180e+02,   0.00000000e+00]
...
``````

I need to get the same sublists but the third element of each sublist (34.02 ..., 2.79 ...) should be divided by 100

You could try this:

``````a = [
[1.3735876284e-05, 0.9277849431216683, 34.02875434027778, 0.0],
[2.60440773e-06,   7.35174234e-01,   2.79259180e+02,   0.00000000e+00],
]
b = [
[(x / 100.0 if i == 2 else x) for (i, x) in enumerate(lst)]
for lst in a
]
``````

Or the lambda version:

``````f = lambda a: [
[(x / 100.0 if i == 2 else x) for (i, x) in enumerate(lst)]
for lst in a
]
b = f(a)
``````
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