main_arr = []
main_arr.append("'ELEMENT")
for i in range(len(main_arr)):
    result = getInterLinks(getLinks(main_arr[i]))
    for url in result:
        if url not in main_arr:
            main_arr.append(url)

>>> lst = [1,2,3,4]
>>> tmp = []
>>> for i in lst: tmp.append(i**2)
>>> lst += tmp
>>> lst
[1, 2, 3, 4, 1, 4, 9, 16]
>>>