Test Average and Grade Python code:

#The method 'determine_grade' accept a test score as an argument
#and return a letter grade for the score, 
#based on the given grading scale
def determine_grade(score):
    if score >= 90:
        return 'A'
    elif score >= 80:
        return 'B'
    elif score >= 70:
        return 'C'
    elif score >= 60:
        return 'D'
    else:
        return 'F'
#The method 'calc_average' should accept five test scores
#as arguments and return the average of the scores.       
def calc_average(scores):
    total = sum(scores)
    average = total / len(scores)
    return average
# Prompt to asks the user to enter five test scores
scores = []
for i in range(5):
    score = int(input("Enter test score #" + str(i+1) + ": "))
    scores.append(score)

# Calculating average
average = calc_average(scores)

# Display a letter grade for each score
# and the average test score.
print("Letter grades:")
for score in scores:
    grade = determine_grade(score)
    print("Score:", score, "Grade:", grade)
print("Average test score:", average)

Executed Output 1:

   
Enter test score #1: 80
Enter test score #2: 90
Enter test score #3: 60
Enter test score #4: 99
Enter test score #5: 51
Letter grades:
Score: 80 Grade: B
Score: 90 Grade: A
Score: 60 Grade: D
Score: 99 Grade: A
Score: 51 Grade: F
Average test score: 76.0

Executed Output 2:

   
Enter test score #1: 50
Enter test score #2: 44
Enter test score #3: 55
Enter test score #4: 60
Enter test score #5: 35
Letter grades:
Score: 50 Grade: F
Score: 44 Grade: F
Score: 55 Grade: F
Score: 60 Grade: D
Score: 35 Grade: F
Average test score: 48.8