State Machine Kodlaması: Switch-Case Yerine Pratik Yöntemler

1class TrafficLight:
2def __init__(self):
3self.state = "red"
4self.handlers = {
5"red": self.handle_red,
6"yellow": self.handle_yellow,
7"green": self.handle_green
8}
9
10def handle_red(self):
11print(" Dur")
12self.state = "green"
13
14def handle_yellow(self):
15print(" Dikkat")
16self.state = "red"
17
18def handle_green(self):
19print(" Geç")
20self.state = "yellow"
21
22def step(self):
23self.handlers[self.state]()
24
25light = TrafficLight()
26for _ in range(6):
27light.step()

1Dur
2Geç
3Dikkat
4Dur
5Geç
6Dikkat

1from abc import ABC, abstractmethod
2
3class State(ABC):
4@abstractmethod
5def handle(self, context):
6pass
7
8class RedState(State):
9def handle(self, context):
10print(" Dur")
11context.state = GreenState()
12
13class GreenState(State):
14def handle(self, context):
15print(" Geç")
16context.state = YellowState()
17
18class YellowState(State):
19def handle(self, context):
20print(" Dikkat")
21context.state = RedState()
22
23class TrafficLight:
24def __init__(self):
25self.state = RedState()
26
27def step(self):
28self.state.handle(self)
29
30light = TrafficLight()
31for _ in range(6):
32light.step()