7/9 Issue


#1

students = [lloyd, alice, tyler]
def average(numbers):
total = sum(numbers)
return float(total)/len(numbers)
def get_average(student):
return .1 * average(student["homework"]) + \
.3 * average(student["quizzes"]) + \
.6 * average(student["tests"])
print get_average(student)
def get_letter_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"
print get_letter_grade(get_average(lloyd))

its returning

Traceback (most recent call last):
File "python", line 28, in
File "python", line 26, in get_average
TypeError: list indices must be integers, not str


#2

I don't know if you changed the supporting code or not but here is some code that passes. Compare and see where you went wrong.

lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}

# Add your function below!
def average(student):
    return float(sum(student)) / len(student)
    
def get_average(student):
    overall_score = 0
    overall_score += average(student["homework"]) * 0.1
    overall_score += average(student["quizzes"]) * 0.3
    overall_score += average(student["tests"]) * 0.6
    return overall_score

def get_letter_grade(score):
    if score >= 90:
        return "A"
    elif 80 <= score <= 90:
        return "B"
    elif 70 <= score <= 80:
        return "C"
    elif 60 <= score <= 70:
        return "D"
    else:
        return "F"

print get_letter_grade(get_average(lloyd))