text: import numpy as np
  import matplotlib.pyplot as plt
  from matplotlib.collections import LineCollection
  from bokeh import mpl
  
  # In order to efficiently plot many lines in a single set of axes,
  # add the lines all at once. Here is a simple example showing how it is done.
  
  N = 50
  x = np.arange(N)
  # Here are many sets of y to plot vs x
  ys = [x + i for i in x]
  
  colors = ['#ff0000', '#008000', '#0000ff', '#00bfbf', '#bfbf00', '#bf00bf', '#000000']
  
  line_segments = LineCollection([list(zip(x, y)) for y in ys], color=colors,
                                  linewidth=(0.5, 1, 1.5, 2), linestyle='dashed')
  
  ax = plt.axes()
  
  ax.add_collection(line_segments)
  ax.set_title('Line Collection with dashed colors')
  
  mpl.to_bokeh(name="lc_dashed")
  