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Python Object-Oriented Python Instant Objects Method Interactivity

Posted by Fernando Boza
Fernando Boza
25,384 Points

Exception: method() takes 1 positional argument but 2 were given

My code is the last method "feedback"

Exception: praise() takes 1 positional argument but 2 were given

first_class.py 
class Student:
    name = "Your Name"

    def praise(self):
        return "You inspire me, {}".format(self.name)

    def reassurance(self):
        return "Chin up, {}. You'll get it next time!".format(self.name)

    def feedback(self, grade):
        if(grade > 50):
            return self.praise(self)
        elif(grade <= 50):
            return self.reassurance(self)

1 Answer

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

When you call an instance method, you don't need to pass "self" explicitly. The system adds that in for you.

The error message is telling you that it got two "self"s but was only expecting the one that the system adds.

Fernando Boza
Fernando Boza
25,384 Points

i tried to go with that and just create a grade property of 50 but still getting the same err

class Student:
    name = 'Blah'
    grade = 50

    def praise(self):
        return 'You inspire me, {}'.format(self.name)

    def reassurance(self):
        return "Chin up, {}. You'll get it next time!".format(self.name)

    def feedback(self):
        if self.grade > 50:
            return self.praise(self)
        elif self.grade <= 50:
            return self.reassurance(self)


Blah = Student()
print(Blah.feedback())
Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

You don't need any code after the class, but you are still passing "self" as an argument in the "return" statements.