Find Elements in Nested For-Loop

Question

I have two lists named extra and be in my code.

extra output is [7,27] and

be output is

'Feed Forage', '', '', '', 'Social Play', '', 'Feed Forage', 'Nonsocial Play', '', 'Nonsocial Play', '', '', '', '', 'Nonsocial Play', '', '', '', '', '', '', '', '', 'Social Play', '', '', '', '', '', '', '', '', 'Nonsocial Play', 'Groom', 'Feed Forage', '', '', 'Nonsocial Play', '', '', 'Feed Forage', '', 'Feed Forage', '', 'Feed Forage', '', 'Social Play', '', 'Social Play', '', '', 'Social Play', '', '', '', '', '', 'Feed Forage', '', '', '', '', 'Feed Forage', '', '', '', '', 'Feed Forage', '', '', 'Feed Forage', '', '', '', '', '', 'Feed Forage', '', '', '', 'Groom', 'Groom', '', '', '', '', 'Groom', 'Groom', 'Groom', '', 'Groom', '', '', '', 'Feed Forage', '', '', 'Feed Forage', 'Nonsocial Play', '', '', '', 'Pace', '', '', '', 'Feed Forage', '', 'Nonsocial Play', '', 'Feed Forage', '', 'Social Play', '', 'Feed Forage', '', 'Social Play', '', 'Social Play', '', '', '', '', '', 'Nonsocial Play', '', 'Social Play', '', '', '', '', 'Feed Forage', '', '', '', '', '', '', '', 'Nonsocial Play', '', 'Nonsocial Play', '', 'Feed Forage', 'Social Play', '', '', '', 'Feed Forage', '', 'Nonsocial Play', '', '', 'Feed Forage', '', '', '', '', 'Self Groom', '', '', 'Groom', '', '', 'Self Groom', '', '', '', '', '', 'Groom', '', '', 'Self Groom', '', '', 'Feed Forage', '', '', '', '', '', 'Pace', '', 'Self Groom', '', '', '', 'Self Groom', '', 'Self Groom', '', 'Social Play', '', 'Social Play', '', 'Self Groom', 'Groom', '', '', 'Groom', '', 'Groom', '', 'Groom', 'Groom', 'Groom', '', '', 'Self Groom', '', 'Groom', '', 'Groom', '', 'Feed Forage', '', 'Feed Forage', '', 'Feed Forage', '', '', '', '', '', '', '', 'Feed Forage', '', '', '', '', 'Feed Forage', 'Nonsocial Play', '', '', 'Self Groom', 'Nonsocial Play', '', '', '', 'Groom', '', '', 'Groom', '', 'Groom', '', '', 'Groom', '', '', 'Groom', '', '', 'Groom', '', '', '', '', '', '', 'Groom', 'Groom', '', 'Groom', '', '', 'Groom', '', '', '', 'Self Groom', '', '', '', '', '', '', 'Groom', '', 'Groom', '', 'Feed Forage', '']

I need to find the 7th and 27th word elements of extra (i.e. elements don't count if they are an empty string). It should be Nonsocial Play and Groom but the for-loop I have only prints Nonsocial Play

These are the for-loops I am using:

for x in extra:
count = 0
for y in be:
    if y != '':
        if x == count:
            print(be[x])
            count += 1
        elif x != count:
            count += 1

If you have any idea why it isn't working, please let me know! EDIT: I want to print these statements but I also need to delete them

Answer 1

You can also just do

extra = [7,27]
be = ['Feed Forage', '', '', '', 'Social Play', '', 'Feed Forage', 'Nonsocial Play', '', 'Nonsocial Play', '', '', '', '', 'Nonsocial Play', '', '', '', '', '', '', '', '', 'Social Play', '', '', '', '', '', '', '', '', 'Nonsocial Play', 'Groom', 'Feed Forage', '', '', 'Nonsocial Play', '', '', 'Feed Forage', '', 'Feed Forage', '', 'Feed Forage', '', 'Social Play', '', 'Social Play', '', '', 'Social Play', '', '', '', '', '', 'Feed Forage', '', '', '', '', 'Feed Forage', '', '', '', '', 'Feed Forage', '', '', 'Feed Forage', '', '', '', '', '', 'Feed Forage', '', '', '', 'Groom', 'Groom', '', '', '', '', 'Groom', 'Groom', 'Groom', '', 'Groom', '', '', '', 'Feed Forage', '', '', 'Feed Forage', 'Nonsocial Play', '', '', '', 'Pace', '', '', '', 'Feed Forage', '', 'Nonsocial Play', '', 'Feed Forage', '', 'Social Play', '', 'Feed Forage', '', 'Social Play', '', 'Social Play', '', '', '', '', '', 'Nonsocial Play', '', 'Social Play', '', '', '', '', 'Feed Forage', '', '', '', '', '', '', '', 'Nonsocial Play', '', 'Nonsocial Play', '', 'Feed Forage', 'Social Play', '', '', '', 'Feed Forage', '', 'Nonsocial Play', '', '', 'Feed Forage', '', '', '', '', 'Self Groom', '', '', 'Groom', '', '', 'Self Groom', '', '', '', '', '', 'Groom', '', '', 'Self Groom', '', '', 'Feed Forage', '', '', '', '', '', 'Pace', '', 'Self Groom', '', '', '', 'Self Groom', '', 'Self Groom', '', 'Social Play', '', 'Social Play', '', 'Self Groom', 'Groom', '', '', 'Groom', '', 'Groom', '', 'Groom', 'Groom', 'Groom', '', '', 'Self Groom', '', 'Groom', '', 'Groom', '', 'Feed Forage', '', 'Feed Forage', '', 'Feed Forage', '', '', '', '', '', '', '', 'Feed Forage', '', '', '', '', 'Feed Forage', 'Nonsocial Play', '', '', 'Self Groom', 'Nonsocial Play', '', '', '', 'Groom', '', '', 'Groom', '', 'Groom', '', '', 'Groom', '', '', 'Groom', '', '', 'Groom', '', '', '', '', '', '', 'Groom', 'Groom', '', 'Groom', '', '', 'Groom', '', '', '', 'Self Groom', '', '', '', '', '', '', 'Groom', '', 'Groom', '', 'Feed Forage', '']

>>> [x for i, x in enumerate(s for s in be if s) if i in extra]
['Nonsocial Play', 'Groom']

Answer 2

I created simple function filter_iter(itr) that filters the iterable in argument itr from any empty values. Then you can access the resulting filtered list with values from list extra:

extra = [7,27]
be = ['Feed Forage', '', '', '', 'Social Play', '', 'Feed Forage', 'Nonsocial Play', '', 'Nonsocial Play', '', '', '', '', 'Nonsocial Play', '', '', '', '', '', '', '', '', 'Social Play', '', '', '', '', '', '', '', '', 'Nonsocial Play', 'Groom', 'Feed Forage', '', '', 'Nonsocial Play', '', '', 'Feed Forage', '', 'Feed Forage', '', 'Feed Forage', '', 'Social Play', '', 'Social Play', '', '', 'Social Play', '', '', '', '', '', 'Feed Forage', '', '', '', '', 'Feed Forage', '', '', '', '', 'Feed Forage', '', '', 'Feed Forage', '', '', '', '', '', 'Feed Forage', '', '', '', 'Groom', 'Groom', '', '', '', '', 'Groom', 'Groom', 'Groom', '', 'Groom', '', '', '', 'Feed Forage', '', '', 'Feed Forage', 'Nonsocial Play', '', '', '', 'Pace', '', '', '', 'Feed Forage', '', 'Nonsocial Play', '', 'Feed Forage', '', 'Social Play', '', 'Feed Forage', '', 'Social Play', '', 'Social Play', '', '', '', '', '', 'Nonsocial Play', '', 'Social Play', '', '', '', '', 'Feed Forage', '', '', '', '', '', '', '', 'Nonsocial Play', '', 'Nonsocial Play', '', 'Feed Forage', 'Social Play', '', '', '', 'Feed Forage', '', 'Nonsocial Play', '', '', 'Feed Forage', '', '', '', '', 'Self Groom', '', '', 'Groom', '', '', 'Self Groom', '', '', '', '', '', 'Groom', '', '', 'Self Groom', '', '', 'Feed Forage', '', '', '', '', '', 'Pace', '', 'Self Groom', '', '', '', 'Self Groom', '', 'Self Groom', '', 'Social Play', '', 'Social Play', '', 'Self Groom', 'Groom', '', '', 'Groom', '', 'Groom', '', 'Groom', 'Groom', 'Groom', '', '', 'Self Groom', '', 'Groom', '', 'Groom', '', 'Feed Forage', '', 'Feed Forage', '', 'Feed Forage', '', '', '', '', '', '', '', 'Feed Forage', '', '', '', '', 'Feed Forage', 'Nonsocial Play', '', '', 'Self Groom', 'Nonsocial Play', '', '', '', 'Groom', '', '', 'Groom', '', 'Groom', '', '', 'Groom', '', '', 'Groom', '', '', 'Groom', '', '', '', '', '', '', 'Groom', 'Groom', '', 'Groom', '', '', 'Groom', '', '', '', 'Self Groom', '', '', '', '', '', '', 'Groom', '', 'Groom', '', 'Feed Forage', '']

def filter_iter(itr):
    return [i for i in itr if i]

be = filter_iter(be)
print([be[e] for e in extra])

Prints:

['Nonsocial Play', 'Groom']