DT | 交互式分析Hologres如何实时查询海量MaxCompute数据，并以可视化方式分析和展现查询结果的最佳实践

def _parse_variant_shapes_and_types(t):
  """Extracts shape and dtype information from a variant tensor `t`."""
  shapes_and_types = _variant_handle_data(t)
  if shapes_and_types is None or not shapes_and_types:
    raise ValueError("Required handle   

def _largest_integer_by_dtype(dt):
  """Helper returning the largest integer exactly representable by dtype."""
  if not _is_known_dtype(dt):
    raise TypeError("Unrecognized dtype: {}".format(dt.name))
  if dt.is_floating:
    return int(2**(np.fin  

def _is_known_signed_by_dtype(dt):
  """Helper returning True if dtype is known to be signed."""
  return {
      dtypes.float16: True,
      dtypes.float32: True,
      dtypes.float64: True,
      dtypes.int8: True,
      dtypes.int16: True,
      d