repr.py

class User:

	active_users = 0

	@classmethod
	def display_active_users(cls):
		return f"There are {cls.active_users} active users."

	@classmethod
	def from_string(cls, data_str):
		first, last, age = data_str.split(',')
		return cls(first, last, int(age))

	def __init__(self, first, last, age):
		self.first = first
		self.last = last
		self.age = age
		User.active_users += 1

	# we added a representation method. A repr method is defined by the developer. 
	def __repr__(self):
		return f"{self.first} is {self.age}"

	def logout(self):
		User.active_users -= 1
		return f"{self.first} has logged out"

	def full_name(self):
		return f"{self.first} {self.last}"

	def initials(self):
		return f"{self.first[0]}.{self.last[0]}"

	def likes(self, thing):
		return f"{self.first} likes {thing}"

	def is_senior(self):
		return self.age >= 65

	def birthday(self):
		self.age += 1
		return f"Happy {self.age}th birthday, {self.first}"

user1 = User("Joe", "Smith", 123)
user2 = User("Blanca", "Roberts", 657)