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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def list_policies(self, filters=None):
 """Retrieve installed trap, drop and bypass policies. :param filters: retrieve only matching policies (optional) :type filters: dict :return: list of installed trap, drop and bypass policies :rtype: list """

        _, policy_list = self.handler.streamed_request("list-policies",
                                                       "list-policy", filters)
        return policy_list