old_contents: import numpy as np
  import holoviews as hv
  
  from bokeh.io import curdoc
  from bokeh.layouts import layout
  
  import holoviews as hv
  renderer = hv.renderer('bokeh').instance(mode='server')
  
  xvals = np.linspace(-4,0,202)
  yvals = np.linspace(4,0,202)
  xs,ys = np.meshgrid(xvals, yvals)
  
  def waves_image(alpha, beta):
      return hv.Image(np.sin(((ys/alpha)**alpha+beta)*xs))
  
  dmap = hv.DynamicMap(waves_image, kdims=['alpha', 'beta'])
  dmap = dmap.redim.values(alpha=np.linspace(0,5.0,10), beta=np.linspace(1,5.0,10))
  
  def modify_doc(doc):
      # Create HoloViews plot and attach the document
      hvplot = renderer.get_widget(dmap, None, doc)
  
      plot = layout([hvplot.state], sizing_mode='fixed')
      doc.add_root(plot)
      return doc
  
  
  doc = modify_doc(curdoc()) 
new_contents: import numpy as np
  import holoviews as hv
  
  from bokeh.io import curdoc
  from bokeh.layouts import layout
  
  import holoviews as hv
  renderer = hv.renderer('bokeh').instance(mode='server')
  
  xvals = np.linspace(-4,0,202)
  yvals = np.linspace(4,0,202)
  xs,ys = np.meshgrid(xvals, yvals)
  
  def waves_image(alpha, beta):
      return hv.Image(np.sin(((ys/alpha)**alpha+beta)*xs))
  
  dmap = hv.DynamicMap(waves_image, kdims=['alpha', 'beta'])
  dmap = dmap.redim.range(alpha=(0,5.0), beta=(1,5.0))
  
  
  def modify_doc(doc):
      # Create HoloViews plot and attach the document
      # hvplot = renderer.get_widget(dmap, None, doc)
      hvplot = renderer.get_widget(dmap, None, doc)
  
      plot = layout([hvplot.state], sizing_mode='fixed')
      doc.add_root(plot)
      return doc
  
  
  doc = modify_doc(curdoc()) 
subject: make dmap work