class_docstr: Drop zero.
class_docstr_tok: ["Drop","zero","."]
code: def __call__(self, num: int) -> bool:
      if not isinstance(num, int):
          raise RuntimeError(f"Input {num} is not int type")
      return num != 0
  
imports: from towhee.operator import Operator, SharedType
label_desc: Use image node_id 2 for calling the ZeroDrop obj's underlying member method code with example usage: obj.__call__(num) and returns: unknown