32. Classes and dunders (double underscores)

Exploit dunders when doing object-oriented programming in Python. In particular, override the __str__ dunder to enable a printer friendly representation of the object.

32.1. Don’t do this

class Student():
    def __init__(self, first_name, last_name):
        self.first_name = first_name
        self.last_name = last_name

student = Student('John', 'Doe')

print(student)

32.2. Do this

class Student():
    def __init__(self, first_name, last_name):
        self.first_name = first_name
        self.last_name = last_name

    def __str__(self):
        return f'{self.first_name} {self.last_name}'

student = Student('John', 'Doe')

print(student)