def _create_ensemble(
policies: Union[List[Policy], PolicyEnsemble, None]
) -> Optional[PolicyEnsemble]:
if policies is None:
return None
if isinstance(policies, list):
return SimplePolicyEnsemble(policies)
elif isinstance(policies, PolicyEnsemble):
return policies
else:
passed_type = type(policies).__name__
raise InvalidParameterException(
f"Invalid param `policies`. Passed object is "
f"of type '{passed_type}', but should be policy, an array of "
f"policies, or a policy ensemble.")
def _create_domain(domain: Union[Domain, Text, None]) -> Domain:
if isinstance(domain, str):
domain = Domain.load(domain)
domain.check_missing_templates()
return domain
elif isinstance(domain, Domain):
return domain
elif domain is None:
return Domain.empty()
else:
raise InvalidParameterException(
f"Invalid param `domain`. Expected a path to a domain "
f"specification or a domain instance. But got "
f"type '{type(domain)}' with value '{domain}'.")