from __future__ import absolute_import from __future__ import division from __future__ import print_function from __future__ import unicode_literals class Error(Exception): pass class Warning(Exception): pass class InterfaceError(Error): pass class DatabaseError(Error): pass class InternalError(DatabaseError): pass class OperationalError(DatabaseError): pass class ProgrammingError(DatabaseError): pass class IntegrityError(DatabaseError): pass class DataError(DatabaseError): pass class NotSupportedError(DatabaseError): pass