old_contents: #
  #  Copyright 2019 The FATE Authors. All Rights Reserved.
  #
  #  Licensed under the Apache License, Version 2.0 (the "License");
  #  you may not use this file except in compliance with the License.
  #  You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  #  Unless required by applicable law or agreed to in writing, software
  #  distributed under the License is distributed on an "AS IS" BASIS,
  #  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  #  See the License for the specific language governing permissions and
  #  limitations under the License.
  #
  
  
  import typing
  
  from fate_arch.common import Party
  
  
  class PartiesInfo(object):
  
      @staticmethod
      def from_conf(conf: typing.MutableMapping[str, dict]):
          try:
              local = Party(role=conf["local"]['role'], party_id=conf['local']['party_id'])
              role_to_parties = {}
              for role, party_id_list in conf.get("role", {}).items():
                  role_to_parties[role] = [Party(role=role, party_id=party_id) for party_id in party_id_list]
          except Exception as e:
              raise RuntimeError(
                  "conf parse error, a correct configuration could be:\n"
                  "{\n"
                  "  'local': {'role': 'guest', 'party_id': 10000},\n"
                  "  'role': {'guest': [10000], 'host': [9999, 9998]}, 'arbiter': [9997]}\n"
                  "}"
              ) from e
          return PartiesInfo(local, role_to_parties)
  
      def __init__(self, local: Party, role_to_parties: typing.MutableMapping[str, typing.List[Party]]):
          self._local = local
          self._role_to_parties = role_to_parties
  
      @property
      def local_party(self) -> Party:
          return self._local
  
      @property
      def all_parties(self):
          return [party for parties in self._role_to_parties.values() for party in parties]
  
      def roles_to_parties(self, roles: typing.Iterable) -> list:
          return [party for role in roles for party in self._role_to_parties[role]]
  
      def role_to_party(self, role, idx) -> Party:
          return self._role_to_parties[role][idx]
  
  
  __all__ = ["PartiesInfo"]
  
  PartiesInfo.from_conf({})
  
new_contents: #
  #  Copyright 2019 The FATE Authors. All Rights Reserved.
  #
  #  Licensed under the Apache License, Version 2.0 (the "License");
  #  you may not use this file except in compliance with the License.
  #  You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  #  Unless required by applicable law or agreed to in writing, software
  #  distributed under the License is distributed on an "AS IS" BASIS,
  #  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  #  See the License for the specific language governing permissions and
  #  limitations under the License.
  #
  
  
  import typing
  
  from fate_arch.common import Party
  
  
  class PartiesInfo(object):
  
      @staticmethod
      def from_conf(conf: typing.MutableMapping[str, dict]):
          try:
              local = Party(role=conf["local"]['role'], party_id=conf['local']['party_id'])
              role_to_parties = {}
              for role, party_id_list in conf.get("role", {}).items():
                  role_to_parties[role] = [Party(role=role, party_id=party_id) for party_id in party_id_list]
          except Exception as e:
              raise RuntimeError(
                  "conf parse error, a correct configuration could be:\n"
                  "{\n"
                  "  'local': {'role': 'guest', 'party_id': 10000},\n"
                  "  'role': {'guest': [10000], 'host': [9999, 9998]}, 'arbiter': [9997]}\n"
                  "}"
              ) from e
          return PartiesInfo(local, role_to_parties)
  
      def __init__(self, local: Party, role_to_parties: typing.MutableMapping[str, typing.List[Party]]):
          self._local = local
          self._role_to_parties = role_to_parties
  
      @property
      def local_party(self) -> Party:
          return self._local
  
      @property
      def all_parties(self):
          return [party for parties in self._role_to_parties.values() for party in parties]
  
      def roles_to_parties(self, roles: typing.Iterable) -> list:
          return [party for role in roles for party in self._role_to_parties[role]]
  
      def role_to_party(self, role, idx) -> Party:
          return self._role_to_parties[role][idx]
  
  
  __all__ = ["PartiesInfo"]
  
subject: fix bug