code: def mean(self) -> ep.Tensor:
      assert self.tensor is not None
      result = np.nanmean(self.data, axis=0)
      return ep.from_numpy(self.tensor, result)
  
imports: from typing import Union, Tuple, Optional, Any
  from typing_extensions import Literal
  import numpy
  import eagerpy
  import logging
  from ..devutils import flatten
  from ..devutils import atleast_kd
  from ..types import Bounds
  from ..models import Model
  from ..criteria import Criterion
  from ..distances import l2
  from ..tensorboard import TensorBoard
  from .blended_noise import LinearSearchBlendedUniformNoiseAttack
  from .base import MinimizationAttack
  from .base import T
  from .base import get_criterion
  from .base import get_is_adversarial
  from .base import raise_if_kwargs
  from .base import verify_input_bounds
label_desc: Use image node_id 6 for calling the ArrayQueue obj's underlying member method code with example usage: obj.mean() and returns: ep