rule-engine 2.2.0

This project provides a library for creating general purpose "Rule" objects from a logical expression which can then be applied to arbitrary objects to evaluate whether or not they match.

This project provides a library for creating general purpose “Rule” objects from a logical expression which can then be applied to arbitrary objects to evaluate whether or not they match.

Documentation is available at https://zeroSteiner.github.io/rule-engine/.

Rule Engine expressions are written in their own language, defined as strings in Python. Some features of this language includes:

• Optional type hinting

• Matching strings with regular expressions

• Datetime datatypes

• Data attributes

Example

The following example demonstrates the basic usage of defining a rule object and applying it to two dictionaries, showing that one matches while the other does not. See Getting Started for more information.

import rule_engine
# match a literal first name and applying a regex to the email
rule = rule_engine.Rule(
    'first_name == "Luke" and email =~ ".*@rebels.org$"'
) # => <Rule text='first_name == "Luke" and email =~ ".*@rebels.org$"' >
rule.matches({
    'first_name': 'Luke', 'last_name': 'Skywalker', 'email': '[e-mail]'
}) # => True
rule.matches({
   'first_name': 'Darth', 'last_name': 'Vader', 'email': '[e-mail]'
}) # => False

Credits

• Spencer McIntyre - zeroSteiner (@zeroSteiner)