class_docstr: Intended parent class for plotting
  modes. Provides base functionality
  in conjunction with its parent,
  PlotMode.
class_docstr_tok: ["Intended","parent","class","for","plotting","modes",".","Provides","base","functionality","in","conjunction","with","its","parent",",","PlotMode","."]
code: def _set_style(self, v):
      if v is None:
          return
      if v == "":
          step_max = 0
          for i in self.intervals:
              if i.v_steps is None:
                  continue
              step_max = max([step_max, int(i.v_steps)])
          v = ["both", "solid"][step_max > 40]
      if v not in self.styles:
          raise ValueError("v should be there in self.styles")
      if v == self._style:
          return
      self._style = v
  
imports: import pyglet.gl
  from sympy.core import S
  from sympy.plotting.pygletplot.color_scheme import ColorScheme
  from sympy.plotting.pygletplot.plot_mode import PlotMode
  from sympy.utilities.iterables import is_sequence
  from time import sleep
  from threading import Thread, Event, RLock
  import warnings
label_desc: Use image node_id 27 for calling the PlotModeBase obj's underlying member method code with example usage: obj._set_style(v) without return types