class_docstr: A base class for blocks
  
  Parameters
  ----------
  ax : matplotlib.axes.Axes, optional
      The matplotlib axes to attach the animation to.
      Defaults to matplotlib.pyplot.gca()
  t_axis : int, optional
      The axis of the data that represents time.
  
  Attributes
  ----------
  ax : matplotlib.axes.Axes
      The matplotlib axes that the block is attached to.
class_docstr_tok: ["A","base","class","for","blocks","Parameters","--","--","--","--","--","ax",":","matplotlib.axes.Axes",",","optional","The","matplotlib","axes","to","attach","the","animation","to",".","Defaults","to","matplotlib.pyplot.gca","(",")","t_axis",":","int",",","optional","The","axis","of","the","data","that","represents","time",".","Attributes","--","--","--","--","--","ax",":","matplotlib.axes.Axes","The","matplotlib","axes","that","the","block","is","attached","to","."]
code: def __init__(self, ax=None, t_axis=None):
      self.ax = ax if ax is not None else plt.gca()
      self.t_axis = t_axis
      self._is_list = False
  
imports: import matplotlib.pyplot
label_desc: Use image node_id 1 to create a new Block object  with example: obj = Block(ax, t_axis)