code: def _pi_stencil(x: np.ndarray) -> np.ndarray:
      """Stencil to compute local parabolic interpolation"""
      a = x[1] + x[-1] - 2 * x[0]
      b = (x[1] - x[-1]) / 2
  
      if np.abs(b) >= np.abs(a):
          # If this happens, we'll shift by more than 1 bin
          # Suppressing types because mypy has no idea about stencils
          return 0  # type: ignore
  
      return -b / a
  
imports: import warnings
  import numpy
  import scipy
  import numba
  from .spectrum import _spectrogram
  from .None import convert
  from .._cache import cache
  from ..None import util
  from ..None import sequence
  from ..util.exceptions import ParameterError
  from numpy.typing import ArrayLike
  from typing import Any, Callable, Optional, Tuple, Union
  from .._typing import _WindowSpec, _PadMode, _PadModeSTFT
label_desc: Use image node_id 5 for calling a global function with example usage: _pi_stencil(x) and returns: unknown, int