Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Python Object-Oriented Python Instant Objects Method Interactivity

Posted by prateekmahesh
prateekmahesh
5,454 Points

I need help in this task(Method Interactivity @OO Python).

I don't understand why I get an error saying 'Exception: name 'praise' is not defined'. The function is already defined but it throws an error.

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:
            praise()
        elif grade<50:
            reassurance()
Anže Vavken
Anže Vavken
4,496 Points
Anže Vavken
Anže Vavken
4,496 Points

Hi this is what worked for me...

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()
    else:
        return self.reassurance()
ilya A
ilya A
3,802 Points

why did you use a comma in:

    def feedback(self,grade):

???

Anže Vavken, I wish I could give you a thumbs up!

zlatkap
zlatkap
21,494 Points
zlatkap
zlatkap
21,494 Points

It is important to provide 2 parameters: grade -> external, provided in call of the function self -> refers to the class itself, so it can refer to its methods

So then you do not have to refer to grade as self.grade because the value will be provided in the call. (For Example, call of the function could be ---> feedback(self, 20) <--- ) But you have to refer to methods as self.praise() and self.reassurance() because they are part of class and you want to let the code know where to find it.