How to convert a for loop output to a list?

Try this using list comprehension

>>>[x+y for y,x in zip(range(0,4,1),range(0,8,2))]
[0, 3, 6, 9]
>>>[str(x+y) for y,x in zip(range(0,4,1),range(0,8,2))]
['0', '3', '6', '9']

The easiest way for your understanding, without using list comprehension, is:

mylist = []
for y,x in zip(range(0,4,1),range(0,8,2)):
    mylist.append(str(x+y))
print mylist

Output:

['0','3','6','9']

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