policy.py

class Policy:
    """Policy for every object in the ecosystem.

    Every policy contains the following:
    * policy_number 
    * object_name 
    * source_name 
    * activity_name
    * Conditions(pre, post and current) are a list of lists of the format
        [ object1, acitivity, value]
    """

    policy_number = None
    object_name = ""
    state_name = ""
    activity_name = ""
    pre_condition = []
    current_condition = []
    post_condition = []

    def __init__(self, policy_number=None, object_name="", state_name="", activity_name="", pre_condition="", current_condition="", post_condition=""):
        self.policy_number = policy_number
        self.object_name = object_name
        self.state_name = state_name
        self.activity_name = activity_name
        self.pre_condition = pre_condition
        self.current_condition = current_condition
        self.post_condition = post_condition

    def get_policy_string(self):
        return (f"{self.policy_number}) <({self.object_name}, {self.state_name}, {self.activity_name}), ({self.pre_condition[0]}, {self.pre_condition[1]}, {self.pre_condition[2]}), ({self.current_condition[0]}, {self.current_condition[1]}, {self.current_condition[2]}), ({self.post_condition[0]}, {self.post_condition[1]}, {self.post_condition[2]})>")