Got this problem, someone can help me?


#1

Got this problem, someone can help me?

Error:

Traceback (most recent call last):
File "python", line 58, in
File "python", line 53, in get_class_average
File "python", line 28, in get_average
TypeError: string indices must be integers, not str

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]
}

Add your function below!

def average(numbers):
total = sum(numbers)
total = float(total)
return total / len(numbers)

def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
return homework * 0.10 + quizzes * 0.30 + tests * 0.60

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))

students = ["lloyd", "alice", "tyler"]

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

print get_class_average(students)
print get_letter_grade(get_class_average(students))


How is Everybody Doing? - string indices must be integers, not str
#2

This list should contain identifiers (reference pointers) not strings.


#3

Thank you! But i still have the same problem:

Error:

B
Traceback (most recent call last):
File "python", line 59, in
File "python", line 54, in get_class_average
File "python", line 30, in get_average
TypeError: string indices must be integers, not str

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]
}

Add your function below!

def average(numbers):
total = sum(numbers)
total = float(total)
return total / len(numbers)

def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
return homework * 0.10 + quizzes * 0.30 + tests * 0.60

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))

students = ["lloyd", "alice", "tyler"]

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

print get_class_average(students)
print get_letter_grade(get_class_average(students))


#7

Ya dinna change the identifiers. Are ya a wee bit daft, laddie?


#8

in your list of 3 students...
students = ["lloyd", "alice", "tyler"]
try removing the quotation marks. its reading them as strings rather than identifiers from what i understand.


#9

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