ruleau 0.2.0

A python rules engine

Ruleau

A Python Rules Engine library

Using the library

from ruleau import execute, rule, ApiAdapter

# create a rule
@rule(rule_id="rul_1", name="Is adult")
def over_18(_, payload):
    return "age" in payload and payload["age"] >= 18

# create a payload (the answers to the rule's questions)
payload = {"age": 17}

# execute the rule against the payload
result = execute(over_18, payload)

# integrate with the backend web API
api_adapter = ApiAdapter(base_url="http://localhost:8000/")

# send the results
result = execute(
    over_18, payload, api_adapter=api_adapter, case_id="ca_1280"
)
# result.result will be False due to applicant being 17

# if the rule for this case is overriden in the backend
# then running again will return True

Testing Rules

Rules should be tested using doctest.

Example of these tests can be found in the Kitchen Sink example.

Generating Documentation

Documentation for the rules can be generated using the ruleau-docs command.

The usage is as follows:

ruleau-docs [--output-dir=<argument>] filename

For example for a file of rules called rules.py run:

ruleau-docs rules.py