class_docstr: GraphicsItem showing a single plot axis with ticks, values, and label.
  Can be configured to fit on any side of a plot, 
  Can automatically synchronize its displayed scale with ViewBox items.
  Ticks can be extended to draw a grid.
  If maxTickLength is negative, ticks point into the plot.
docstr: Set the alpha value (0-255) for the grid, or False to disable.
  
  When grid lines are enabled, the axis tick lines are extended to cover
  the extent of the linked ViewBox, if any.
docstr_tok: ["Set","the","alpha","value","(","0-255",")","for","the","grid",",","or","False","to","disable",".","When","grid","lines","are","enabled",",","the","axis","tick","lines","are","extended","to","cover","the","extent","of","the","linked","ViewBox",",","if","any","."]
code: def setGrid(self, grid):
      """Set the alpha value (0-255) for the grid, or False to disable.
  
      When grid lines are enabled, the axis tick lines are extended to cover
      the extent of the linked ViewBox, if any.
      """
      self.grid = grid
      self.picture = None
      self.prepareGeometryChange()
      self.update()
  
imports: import weakref
  from math import ceil, floor, isfinite, log10, sqrt, frexp, floor
  import numpy
  from ..None import debug
  from ..None import functions
  from ..None import getConfigOption
  from ..Point import Point
  from ..Qt import QtCore, QtGui, QtWidgets
  from .GraphicsWidget import GraphicsWidget
label_desc: Use image node_id 4 for calling the AxisItem obj's underlying member method code with example usage: obj.setGrid(grid) without return types