old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  # import uuid
  
  from db.common import Base
  from db.common import session_scope
  
  
  class SpecificEvent():
  
      @classmethod
      def find_by_event_id(self, event_id):
          # retrieving table name for specific event
          table_name = self.__tablename__
  
          # finding class associated with table name
          for c in Base._decl_class_registry.values():
              if hasattr(c, '__tablename__') and c.__tablename__ == table_name:
                  break
  
          # retrieving specific event with the associated class type
          with session_scope() as session:
              try:
                  specific_event = session.query(c).filter(
                      c.event_id == event_id
                  ).one()
              except:
                  specific_event = None
              return specific_event
  
      def update(self, other):
          # copying each standard attribute value from other object to this one
          for attr in self.STANDARD_ATTRS:
              setattr(self, attr, getattr(other, attr))
  
      def __eq__(self, other):
          # comparing each standard attribute value (and event id) of this object
          # with other one's
          return (
              [self.event_id] +
              [getattr(self, attr) for attr in self.STANDARD_ATTRS]
          ) == (
              [other.event_id] +
              [getattr(other, attr) for attr in other.STANDARD_ATTRS]
          )
  
      def __ne__(self, other):
          return not self == other
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  from db.common import Base
  from db.common import session_scope
  
  
  class SpecificEvent():
  
      @classmethod
      def find_by_event_id(self, event_id):
          # retrieving table name for specific event
          table_name = self.__tablename__
  
          # finding class associated with table name
          for c in Base._decl_class_registry.values():
              if hasattr(c, '__tablename__') and c.__tablename__ == table_name:
                  break
  
          # retrieving specific event with the associated class type
          with session_scope() as session:
              try:
                  specific_event = session.query(c).filter(
                      c.event_id == event_id
                  ).one()
              except:
                  specific_event = None
              return specific_event
  
      def update(self, other):
          # copying each standard attribute value from other object to this one
          for attr in self.STANDARD_ATTRS:
              setattr(self, attr, getattr(other, attr))
  
      def __eq__(self, other):
          # comparing each standard attribute value (and event id) of this object
          # with other one's
          return (
              [self.event_id] +
              [getattr(self, attr) for attr in self.STANDARD_ATTRS]
          ) == (
              [other.event_id] +
              [getattr(other, attr) for attr in other.STANDARD_ATTRS]
          )
  
      def __ne__(self, other):
          return not self == other
  
subject: Fix import