7/9 Sending A Letter: Still not printing?


#1

https://www.codecademy.com/courses/learn-python/lessons/student-becomes-the-teacher/exercises/sending-a-letter

I’ve managed to complete the lesson, but am still unable to print. I’ve checked the indents with my print statement, but can see no issue. See error message below:

Traceback (most recent call last):
File “python”, line 43, in
File “python”, line 29, in get_average
TypeError: sum expected at most 2 arguments, got 3

```python
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]
}

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

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

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))

#2

Put them in a list and all will work as expected.


#3

I followed your suggestion, by making the following changes, and it worked. Thanks, again!

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

#4

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