I wasted plenty of hours trying to figure out the problem but no luck. Tried asking the TA at my school, but he was useless. I am a beginner and I know there are a lot of mistakes in it, so it would be great if I can get some detail explanation as well. Anyways, basically what I am trying to do with the following function is:

• Use while loop to check and see if random_string is in TEXT, if not return NoneType
• if yes, then use a for loop to read lines from that TEXT and put it in list, l1.
• then, write an if statement to see if random_string is in l1.
• if it is, then do some calculations.
• else read the next line
• Finally, return the calculations as a whole.

TEXT = open('randomfile.txt')

def random (TEXT, random_string):
    while random_string in TEXT:
        for lines in TEXT:
            l1=TEXT.readline().rsplit()
            if random_string in l1:
                '''
                    do some calculations
                '''
            else:
                TEXT.readline() #read next line???
        return #calculations
    return None