def fire_counting():
net = ReteNetwork()
@Production(
Fact(number=V('x')) & ~Fact(before=V('x'))
& Bind(lambda x: str(int(x) + 1), V('y')))
def add1(net, x, y):
f = Fact(number=y, before=x)
net.add_fact(f)
net.add_production(add1)
assert len(net.wmes) == 0
net.add_fact(Fact(number='1'))
assert len(net.wmes) == 2
print(net)
for i in range(5):
net.run(1)
assert len(net.wmes) == (3 * (i + 1)) + 2
def test_readme_network():
net = ReteNetwork()
f1 = Fact(light_color="red")
net.add_fact(f1)
f1['light_color'] = "green"
net.update_fact(f1)
net.remove_fact(f1)
f1 = Fact(light_color="red")
@Production(V('fact') << Fact(light_color="red"))
def make_green(net, fact):
print('making green')
fact['light_color'] = 'green'
net.update_fact(fact)
@Production(V('fact') << Fact(light_color="green"))
def make_red(net, fact):
print('making red')
fact['light_color'] = 'red'
net.update_fact(fact)
light_net = ReteNetwork()
light_net.add_fact(f1)
light_net.add_production(make_green)
light_net.add_production(make_red)
light_net.update_fact(f1)
# print(light_net)
light_net.run(5)
matches = list(light_net.matches)
print(matches)
new = list(light_net.new_matches) # noqa E262
matches[0].fire()