code: def first_valid_transform(
      tape: qml.tape.QuantumTape, index: int
  ) -> (Sequence[qml.tape.QuantumTape], Callable):
      """A valid transform."""
      tape = tape.copy()
      tape._ops.pop(index)  # pylint:disable=protected-access
      _ = (qml.PauliX(0), qml.S(0))
      return [tape], lambda x: x
  
imports: from typing import Sequence, Callable
  from functools import partial
  import pytest
  import pennylane
  from pennylane.transforms.core import transform, TransformError, TransformContainer
label_desc: Use image node_id 7 for calling a global function with example usage: first_valid_transform(tape, index) and returns: list,  function