Test Answers check

def calculatescore(mydi,codi):
    count=0
    for it in mydi:
        if it in codi:
            if mydi[it]==codi[it]:
                count+=1
    if abs(len(mydi)-len(codi))>0:
     count=-1
    return count

student_answers = {1: "A", 2: "B", 3: "C", 4: "D", 5: "E"}
correct_answers = {1: "A", 2: "B", 3: "A", 4: "D", 5: "B"}
print(calculatescore(student_answers, correct_answers))