code: def __init__(self):
      self._force_update = True
      self._old_limits = None
      super(GridHelperBase, self).__init__()
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import six
  import warnings
  import numpy
  from matplotlib import rcParams
  import matplotlib.artist
  import matplotlib.axes
  from matplotlib.path import Path
  from matplotlib.transforms import Bbox
  from .axisline_style import AxislineStyle
  from .axis_artist import AxisArtist, GridlinesCollection
label_desc: Use image node_id 1 to create a new GridHelperBase object from inherited base classes: object with example: obj = GridHelperBase()