# *_*coding:utf-8 *_*
# @Author : zyb
class Rule:
def __init__(self, condition, action):
#初始化规则:两个函数，第一个函数成立返回True,执行第二个函数
self.condition = condition
self.action = action
def evaluate(self, facts):
#评估规则:param facts: 事实字典
if self.condition(facts):
self.action(facts)
class Agenda:
def __init__(self):
self.rules = []
#添加规则到引擎 Rule 对象
def add_rule(self, rule):
self.rules.append(rule)
def run(self, facts):
"""运行规则引擎:param facts: 事实字典"""
for rule in self.rules:
rule.evaluate(facts)
class Fact(dict):
def __getattr__(self, name):
return self.get(name,None)
if __name__ == '__main__':
# 第一个判断函数
def one_condition_one(facts):
print('第一个判断函数：', facts)
return False
# 第一个执行函数
def one_condition_two(facts):
print('第一个执行函数:', facts)
# 创建规则引擎
engine = Agenda()
# 添加规则
engine.add_rule(Rule(one_condition_one, one_condition_two))
y = Fact(x=6,y=7)
x = {'x': 6, 'y': 7}
# 运行规则引擎
engine.run(y)
engine.run(x)
