# Comparing Numbers in Multiple Lists Python

## Issue

I have 5 sets of values that look like this:

``````[[83.91649562 79.51353257]
[87.57474691 84.66544614]
[84.08067077 85.19063777]
[86.97440657 86.20994142]
[82.91694642 84.65734125]]
``````

My goal is to compare the two values within each set with this criteria:

1. in any of the lists, if item1 and item2 are >= 80 AND item1 < item2, return -10
2. in any of the lists, if item1 and item2 are <= 20 AND item1 > item2, return 10
3. else return 0

Here’s what I’ve done

``````def myfunction(data):
data = data.iloc[:, [0, 1]].values
for x, y in enumerate(data):
if (x-y).all() >= 80 and x < y:
return -10
else:
return 0
``````

Right now I’m returning 0, however the 3rd and 5th lists met the criteria and should have returned -10 so I haven’t moved on to the second if statement.
I’ve also tried setting up the data with:

``````data = data.iloc[:, [0, 1]].values.tolist()
``````

to use the data as

``````[[83.91649561983937, 79.51353257164777], [87.57474691499445, 84.66544613660386], [84.08067077024245, 85.19063776835876], [86.97440656949847, 86.20994141824511], [82.91694641784167, 84.65734125252753]]
``````

With no luck. I’ve been using enumarate() because I’ve had the most success with not getting error messages but I’m not sure if that’s necessarily what I need for this problem.

Thanks all!

## Solution

Without using any library, For simplification you can write loop like this

``````#Devil
lst = [[83.91649562, 79.51353257],
[87.57474691, 84.66544614],
[84.08067077, 85.19063777],
[86.97440657, 86.20994142],
[82.91694642, 84.65734125]]

fill_out = []
for i in lst:
#print(i)
item1 = i[0] ; item2 = i[1]
if item1 >= 80 and item2 >= 80 and item1 < item2:
fill_out.append(-10)
elif item1 <= 20 and item2 <= 20 and item1 > item2:
fill_out.append(10)
else:
fill_out.append(0)

print("output:",fill_out)
#output : [0, 0, -10, 0, -10]
``````

Answered By – Devil

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