What’s going wrong despite using “grade.score” to append “self.grades”

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#1

Can anyone help me out with my code below, I don’t get what’s going wrong despite using “grade.score” to append “self.grades”:

class Student:
  
  def __init__(self, name, year):
    self.name = name
    self.year = year
    self.grades = []
  
  def add_grade(self, grade):
    if type(grade) == Grade:
      self.grades.append(grade.score)

  def get_average(self):
    return sum(self.grades) / len(self.grades)      

class Grade:

  def __init__(self, score):
    self.score = score
    
pieter = Student("Pieter Bruegel the Elder", 8)

pieter.add_grade(Grade(100))
pieter.add_grade(Grade(70))

print(pieter.get_average)
print(pieter.grades)
print(sum(pieter.grades) / len(pieter.grades))

For some reason the following is printed for my first print command:
“<bound method Student.get_average of <main.Student object at 0x7fbc60427828>>”

Whereas for the following two print commands I do print a list of int and get a proper average:
[100, 70]
85.0

This is what I expect. Please help!!

Python Classes Review - Further Practice Discussion
#2

That is a method call so should have () to invoke it.

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#3

of course! ■■■■, thanks a lot, especially for the prompt reply.

Much appreciated!!

#4 
class Student:
  
  def __init__(self, name, year):
    self.name = name
    self.year = year
    self.grades = []
  
  def add_grade(self, grade):
    if type(grade) == Grade:
      self.grades.append(grade)

  def get_average(self):
    grade_score = [element.score for element in self.grades]
    return sum(grade_score)/len(grade_score)

class Grade:

  def __init__(self, score):
    self.score = score
    
pieter = Student("Pieter Bruegel the Elder", 8)

pieter.add_grade(Grade(100))
pieter.add_grade(Grade(70))

print(pieter.grades[0].score)
print(pieter.get_average())

So I think I figured out how to calculate the average score while using objects of the class Grade to append “self.grades”, see code above.

Just for my deeper understanding; what is the point of creating a custom class for Grade if in the end we convert back to integer datatype for the calculations anyway?

#5

It permits us to give Grade object special methods of their own, such as is_passing() which should come up in the exercise.

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