business_rule_engine demo

test.py

params = {
    'products_in_stock': 10
}

def order_more(items_to_order):
    print('you ordered {} new items'.format(items_to_order))
    return items_to_order
    
with open('test.rules', 'r') as f:
    rules = f.read()

from business_rule_engine import RuleParser

parser = RuleParser()
parser.register_function(order_more)
parser.parsestr(rules)
parser.execute(params)

test.rules

rule "order new items"
when
    products_in_stock < 20
then
    order_more(50)
end