class_docstr: repeat input num
code: def __call__(self, num: int):
      if not isinstance(num, int):
          raise RuntimeError("Input is not int type")
  
      Outputs = NamedTuple("Outputs", [("num", int)])
      return [Outputs(num) for i in range(self._repeat)]
  
file_path: towhee/tests/unittests/mock_operators/repeat_operator/repeat_operator.py
imports: from typing import NamedTuple
  from towhee.operator import Operator, SharedType
label_desc: Use image node_id 2 for calling the RepeatOperator obj's underlying member method code with example usage: obj.__call__(num) and returns: unknown