在类python中实现规则

class RuleEngine:
    def __init__(self):
        self.rules = []

    def add_rule(self, condition, action):
        self.rules.append((condition, action))

    def execute_rules(self, data):
        for condition, action in self.rules:
            if condition(data):
                action(data)
                break

# 示例规则
def is_even(data):
    return data % 2 == 0

def print_message(data):
    print("The number is even.")

# 创建规则引擎对象
engine = RuleEngine()

# 添加规则
engine.add_rule(is_even, print_message)

# 执行规则
engine.execute_rules(4)