ruleau 0.0.9

A python rules engine

Ruleau

A Python Rules Engine library

Using the library

from ruleau import execute, rule
from ruleau.adapter import ApiAdapter

# create a rule
@rule(name="over_18")
def over_18(context, 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_jsonpath="$.case_id"
)
# 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 docs.py

The usage is as follow:

python docs.py [--output-dir=<argument>] filename

For example using kitchen_sink

python docs.py ../examples/kitchen_sink/rules.py

Development Notes

# install pre-commit config
pre-commit install

# test individual file
python -m pytest --log-cli-level=debug tests/test_adapter.py

# full test
make format
make lint
make test

# all together
make format_lint_test