A simple approach to overriding string output of an object

Medium.py

class Medium(object):

    def __init__(self, username, age, interests):
        self.username = username
        self.age = age
        self.interests = interests
    
    def __str__(self):
        '''
        We swap the default string output of this class with an informative
        description of the properties of this Medium object, including the user
        handle, their age, and their interests.
        '''
        return "Medium user: @{0}; age: {1}; interests: {2}" \
                    .format(self.username, self.age, ', '.join(map(str, self.interests)))

# output: Medium user: @ahmedsakr; age: 23; interests: philosophy, programming, netflix
print (Medium("ahmedsakr", 23, ['philosophy', 'programming', 'netflix']))