How do I implement the Strategy Pattern in my code?

How do I implement the Strategy Pattern in my code?

The Strategy Pattern is a behavioral design pattern that enables selecting an algorithm's behavior at runtime. Would you like a code example?

Yes, please provide a code example in Python.

Sure! Here's a simple example:

class Strategy:
    def execute(self):
        pass

class ConcreteStrategyA(Strategy):
    def execute(self):
        return "Strategy A"

class ConcreteStrategyB(Strategy):
    def execute(self):
        return "Strategy B"

class Context:
    def __init__(self, strategy: Strategy):
        self._strategy = strategy

    def set_strategy(self, strategy: Strategy):
        self._strategy = strategy

    def execute_strategy(self):
        return self._strategy.execute()

# Usage
context = Context(ConcreteStrategyA())
print(context.execute_strategy())  # Output: Strategy A
context.set_strategy(ConcreteStrategyB())
print(context.execute_strategy())  # Output: Strategy B

How do I choose which strategy to use at runtime?

You can choose a strategy based on user input, configuration settings, or any other runtime conditions that dictate the behavior needed.