code: def partial_schema(schema, filtered_fields):
      
      return Schema({
          k: v for k, v in schema.schema.items()
          if getattr(k, 'schema', k) not in filtered_fields
      }, extra=ALLOW_EXTRA)
docs: Validator for part of a schema, ignoring some fields
  
      :param schema: the Schema
      :param filtered_fields: fields to filter out