def extract_error_messages(exception):
 if isinstance(exception, DeserializationException):
  return exception.args[0]
 if hasattr(exception, 'errors'):
  return exception.errors
 if hasattr(exception, 'message'):
  return exception.message
 if hasattr(exception, '__str__'):
  return str(exception)
 return None

def extract_error_messages ( exception ) : if isinstance ( exception , DeserializationException ) : return exception . args [ 0 ] if hasattr ( exception , 'errors' ) : return exception . errors if hasattr ( exception , 'message' ) : return exception . message if hasattr ( exception , '__str__' ) : return str ( exception ) return None
tries to extract a dictionary mapping field name to validation error messages from exception .