code: def _locate_schemas(self, schemas, skip_missing_schemas):
          
          for schema in schemas:
              if schema == os.path.abspath(schema):
                  schema_file = schema
              else:
                  schema_file = os.path.join(self.paths.schemas, schema)
  
              if os.path.isfile(schema_file):
                  # Absolute path: use it.
                  yield schema_file
              elif skip_missing_schemas:
                  logger.warning("Unable to locate schema %s at %s", schema, schema_file)
              else:
                  raise PathError("Unable to locate schema %s at %s" % (schema, schema_file))
docs: Locate all schemas (look in openldap store).
  
          If skip_missing_schemas is True, ignore missing schemas;
          otherwise, raise.