old_contents: from matplotlib import pyplot as plt
  import numpy as np
  
  
  def plot_line_expansion(edisgo_obj,timesteps):
  
      pypsa_plot = edisgo_obj.to_pypsa(mode='mv',timesteps=timesteps)
      bus_index = pypsa_plot.buses.index
      pypsa_plot.buses.x.loc[bus_index] = edisgo_obj.topology.mv_grid.buses_df.x.loc[bus_index]
      pypsa_plot.buses.y.loc[bus_index] = edisgo_obj.topology.mv_grid.buses_df.y.loc[bus_index]
      line_colors = edisgo_obj.opf_results.lines.squeeze()
      plt.figure(figsize=(12, 8))
      ax = plt.gca()
      v = np.linspace(min(line_colors), max(line_colors), 101)
      psa_plot = pypsa_plot.plot(line_colors=line_colors, line_cmap=plt.cm.cool, ax=ax, geomap=False)
      cb = plt.colorbar(psa_plot[1])
      cb.set_clim(vmin=v[0], vmax=v[-1])
      cb.set_label('Number of installed lines')
  
      return
  
new_contents: from matplotlib import pyplot as plt
  import numpy as np
  
  
  def plot_line_expansion(edisgo_obj,timesteps):
  
      pypsa_plot = edisgo_obj.to_pypsa(mode='mv',timesteps=timesteps)
      bus_index = pypsa_plot.buses.index
      pypsa_plot.buses.x.loc[bus_index] = edisgo_obj.topology.mv_grid.buses_df.x.loc[bus_index]
      pypsa_plot.buses.y.loc[bus_index] = edisgo_obj.topology.mv_grid.buses_df.y.loc[bus_index]
      line_colors = edisgo_obj.opf_results.lines.squeeze()
      plt.figure(figsize=(12, 8))
      ax = plt.gca()
      v = np.linspace(min(line_colors), max(line_colors), 101)
      psa_plot = pypsa_plot.plot(line_colors=line_colors, line_cmap=plt.cm.cool, ax=ax, geomap=False)
      cb = plt.colorbar(psa_plot[1])
      cb.set_clim(vmin=v[0], vmax=v[-1])
      cb.set_label('Number of installed lines')
      plt.show()
  
      return
  
subject: Add plot show