Question

1. Create a new program in Mu and save it as ps4.3.1.py and take the code below and fix it as indicated in the comments:

   # Write a function called grade_scantron. grade_scantron should
   # take as input two lists: answers and key. Each list contain
   # strings. Each string will be only one letter, a character
   # from A to E. grade_scantron should return how many questions
   # the student got "right", where a student gets a question
   # right if their answer for a problem matches the answer key.
   #
   # In other words, if value of the first item in answers matches
   # the value of the first item in key, the student gets a point.
   # If it does not, the student does not get a point.
   #
   # If the lists do not have the same number of items, return
   # -1 to indicate that the answer key did not belong to the
   # same test as the student's answers.\
   #
   # Hint: in the past, lots of people have tried to do this using
   # the index() method. That won't work! You'll need to track the
   # index yourself.
   
   # Write your function here!
   
   # Below are some lines of code that will test your function.
   # You can change the value of the variable(s) to test your
   # function with different inputs.
   #
   # If your function works correctly, this will originally
   # print: 7
   test_answers = ["A", "B", "B", "A", "D", "A", "B", "A", "E"]
   test_key = ["A", "B", "B", "A", "D", "E", "B", "A", "D"]
   print(grade_scantron(test_answers, test_key))

Answer 1

Please comment if you have any doubt

Code:

def grade_scantron(answers, key):
'''function to calculate grade'''
#if the lists len is not same return -1
if(len(answers)!=len(key)):
return -1
#count of matches of answer with key
count=0
for i in range(len(answers)):
#if answer in a position with matches key
#then count is incremented
if(answers[i]==key[i]):
count+=1
#return total score
return count

test_answers = ["A", "B", "B", "A", "D", "A", "B", "A", "E"]
test_key = ["A", "B", "B", "A", "D", "E", "B", "A", "D"]
print(grade_scantron(test_answers, test_key))


def grade_scantron (answers, key) : ""'function to calculate grade!!! #if the lists len is not same return -1 if(len (answers) !=len (key)): return -1 #count of matches of answer with key count=0 for i in range (len (answers)): #if answer in a position with matches key #then count is incremented if(answers[i]==key[i]): count+=1 #return total score return count test_answers ["A", "B", "B", "A", "D", "A", "B", "A", "E"] test_key = ["A", "B", "B", "A", "D", "E", "B", "A", "D"] print (grade_scantron (test_answers, test_key))||
Output:

7