__init__() is Python’s instance initializer. It runs after an object has been constructed and sets up the object’s initial state. It receives self, a reference to the new instance, plus any arguments needed to establish its attributes. section 2.2.2
A class groups related data and behavior: attributes hold state, while methods can access or change it through self. Creating an instance resembles calling a function, with arguments passed to __init__ excluding self. section 2.2.2
Initializing a game simulator
class RockPaperScissorsSimulator:\n def __init__(self):\n self.computer_choice = None\n self.human_choice = None\n\nRPS = RockPaperScissorsSimulator()\nRPS.simulate()\n\nThe initializer gives both choices a known starting state; later methods update and read those attributes through self.
