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    <p>So, I decided to work off of your second example, since it was the easiest for me to follow.</p> <p>Here is a modified file, with explanations, which does what I think you want. I assumed the student answers were in a text file called <code>student_answers.txt</code> and had one answer per line.</p> <pre><code>#!/usr/bin/env python def read_student(path): with open(path, 'r') as infile: contents = infile.read() # Automatically gets rid of the newlines. return contents.split('\n') def pass_fail(answers, student): correct_list = [] wrong_list = [] # Use the 'enumerate' function to return the index. for index, (ai, bi) in enumerate(zip(answers, student)): # since problems start with 1, not 0 problem_number = index + 1 if ai == bi: correct_list.append(problem_number) else: wrong_list.append(problem_number) # Print the length of the list, not the list itself. print(len(correct_list), 'were answered correctly') print(len(wrong_list), 'questions were missed') if len(correct_list) &gt;= 15: print('Congrats, you have passed') else: print('Sorry, you have failed. Please study and try again in 90 days') print('Any attempt to retake test before 90 days will result in suspension of any licenses') # Display each missed number on a separate line print ('You missed questions numbers:') for num in wrong_list: print(' ' + str(num)) def main( ): key = ['B', 'D', 'A', 'A', 'C', 'A', 'B', 'A', 'C', 'D', 'B', 'C', 'D', 'A', 'D', 'C', 'C', 'B', 'D', 'A'] student_answers = read_student('student_answers.txt') pass_fail(key, student_answers) if __name__ == '__main__': main() </code></pre> <p>Some general comments:</p> <ul> <li>In your <code>main</code> function, you created a key, printed it, and tried to access it inside the <code>pass_fail</code> function. That won't work -- when you create a variable inside a function, it is not automatically accessible outside of the function. There were several solutions you could have done: <ul> <li>Made <code>key</code> a global variable. This is an <a href="https://stackoverflow.com/q/484635/646543">undesirable solution</a></li> <li>Pass the <code>key</code> variable into the <code>pass_fail</code> function. This is what I did.</li> </ul></li> <li><p>Your code to read the student's file was a bit too complex. You could use the <code>with</code> statement, which automatically opens and closes the file object (<code>infile</code>) for you. Similarly, Python comes with built-in ways to help split the string in your textfile up and remove the newline character. In addition, for the future, you can also iterate over each line in a file like the below instead of manually looping through it:</p> <pre><code>with open('file.txt') as my_file: for line in my_file: print(line) # The newline is still a part of the string! </code></pre></li> <li><p>I'm not sure why you had both the <code>wrong_list</code> and <code>missed_list</code> variables inside <code>pass_fail</code>. I deleted <code>missed_list</code>.</p></li> <li>The problem with your <code>for</code> loop was that you were storing the correct answers, not the problem numbers. To solve that, I used the built-in <a href="http://docs.python.org/2/library/functions.html#enumerate" rel="nofollow noreferrer"><code>enumerate</code></a> function which is quite useful for this sort of thing. Alternatively, you could have used a variable and incremented it once per loop.</li> <li>Your <code>print</code> statements were a little malformed, so I cleaned that up</li> <li>When printing the results for the user, you don't want to print the list. Rather, you want to print the <em>length</em> of the list.</li> <li>I don't know if this was intentional or not, but your key didn't have strings in it, and instead had just the letter names. </li> </ul>
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