[solved]How is Everybody Doing?


#1


i am getting following errors,not able to understand what is wrong
B
Traceback (most recent call last):
File "python", line 52, in
File "python", line 48, in get_class_average
File "python", line 28, in get_average
TypeError: string indices must be integers, not str

not sure what is wrong in the code....


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]
}
students = ["lloyd","alice","tyler"]
# Add your function below!
def average (numbers):
    num =[31,23,23,45,0]
    total = sum(numbers)
    total = float(total)
    total =total/len(numbers)
    return total
def get_average(students):
    homework=average(students["homework"])
    quizzes=average(students["quizzes"])
    tests=average(students["tests"])
    return 0.1*homework+0.3*quizzes+ 0.6*tests
def get_letter_grade(score):
    if score >= 90 and score <=100:
        return "A"
    elif score >= 80 and score <90:
        return "B"
    elif score >= 70 and score <80:
        return "C"
    elif score >=60 and score <70:
        return "D"
    else:
        return "F"
print  get_letter_grade(get_average(lloyd))

def get_class_average(students): 
    results = [ ]
    for name in students:
        results.append(get_average(name))
        print results
    return average(results)
 
print get_class_average(students)
print get_letter_grade(get_average(students))


#2

this is resolved, list should not have items in double quotes


#3