old_contents: #
  #    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.
  
  from testcontainers.core.container import DockerContainer
  from testcontainers.core.waiting_utils import wait_container_is_ready
  from deprecation import deprecated
  from sqlalchemy.exc import OperationalError
  
  
  class DbContainer(DockerContainer):
      def __init__(self, image, **kwargs):
          super(DbContainer, self).__init__(image, **kwargs)
  
      @wait_container_is_ready(OperationalError)
      def _connect(self):
          import sqlalchemy
          engine = sqlalchemy.create_engine(self.get_connection_url())
          engine.connect()
  
      def get_connection_url(self):
          raise NotImplementedError
  
      def _create_connection_url(self, dialect, username, password,
                                 host=None, port=None, db_name=None):
          if self._container is None:
              raise RuntimeError("container has not been started")
          if not host:
              host = self.get_container_host_ip()
          port = self.get_exposed_port(port)
          url = "{dialect}://{username}:{password}@{host}:{port}".format(
              dialect=dialect, username=username, password=password, host=host, port=port
          )
          if db_name:
              url += '/' + db_name
          return url
  
      def start(self):
          self._configure()
          super().start()
          self._connect()
          return self
  
      def _configure(self):
          raise NotImplementedError
  
  
  class GenericContainer(DockerContainer):
      @deprecated(details="Use `DockerContainer`.")
      def __init__(self, image):
          super(GenericContainer, self).__init__(image)
  
new_contents: #
  #    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.
  
  from testcontainers.core.container import DockerContainer
  from testcontainers.core.waiting_utils import wait_container_is_ready
  from deprecation import deprecated
  ADDITIONAL_TRANSIENT_ERRORS = []
  try:
      from sqlalchemy.exc import OperationalError
      ADDITIONAL_TRANSIENT_ERRORS.append(OperationalError)
  except ImportError:
      pass
  
  
  class DbContainer(DockerContainer):
      def __init__(self, image, **kwargs):
          super(DbContainer, self).__init__(image, **kwargs)
  
      @wait_container_is_ready(*ADDITIONAL_TRANSIENT_ERRORS)
      def _connect(self):
          import sqlalchemy
          engine = sqlalchemy.create_engine(self.get_connection_url())
          engine.connect()
  
      def get_connection_url(self):
          raise NotImplementedError
  
      def _create_connection_url(self, dialect, username, password,
                                 host=None, port=None, db_name=None):
          if self._container is None:
              raise RuntimeError("container has not been started")
          if not host:
              host = self.get_container_host_ip()
          port = self.get_exposed_port(port)
          url = "{dialect}://{username}:{password}@{host}:{port}".format(
              dialect=dialect, username=username, password=password, host=host, port=port
          )
          if db_name:
              url += '/' + db_name
          return url
  
      def start(self):
          self._configure()
          super().start()
          self._connect()
          return self
  
      def _configure(self):
          raise NotImplementedError
  
  
  class GenericContainer(DockerContainer):
      @deprecated(details="Use `DockerContainer`.")
      def __init__(self, image):
          super(GenericContainer, self).__init__(image)
  
subject: Fix dependency regression (fixes #194). (#196)