docstr: nth_coord = along which coordinate value varies
  in 2D, nth_coord = 0 ->  x axis, nth_coord = 1 -> y axis
docstr_tok: ["nth_coord","=","along","which","coordinate","value","varies","in","2D",",","nth_coord","=","0","-",">","x","axis",",","nth_coord","=","1","-",">","y","axis"]
code: def __init__(self, axes, loc, nth_coord=None):
      """
      nth_coord = along which coordinate value varies
      in 2D, nth_coord = 0 ->  x axis, nth_coord = 1 -> y axis
      """
      super().__init__(loc)
      self.axis = [axes.xaxis, axes.yaxis][self.nth_coord]
  
imports: import numpy
  import matplotlib
  from matplotlib import _api
  import matplotlib.axes
  from matplotlib.path import Path
  from mpl_toolkits.axes_grid1 import mpl_axes
  from .axisline_style import AxislineStyle
  from .axis_artist import AxisArtist, GridlinesCollection
label_desc: Use image node_id 1 to create a new FixedAxisArtistHelperRectilinear object from inherited base classes: _FixedAxisArtistHelperBase with example: obj = FixedAxisArtistHelperRectilinear(axes, loc, nth_coord)