How to show in python a histogram for each RGB value of image, separetely?

Question

I can plot a histogram for RGB images but I want to plot it separately, one for the red value, one for the green, and one for the blue. How could I separate it?

What I have until now:

  #tuple to select colors of each channel line
  colors = ("red", "green", "blue")
  channel_ids = (0, 1, 2)

  # create the histogram plot, with three lines, one for
  # each color
  plt.xlim([0, 256])
  for channel_id, c in zip(channel_ids, colors):
      histogram, bin_edges = np.histogram(image[:, :, channel_id], bins=256, range=(0, 256))
      plt.plot(bin_edges[0:-1], histogram, color=c)

  plt.xlabel("Color value")
  plt.ylabel("Pixels")

  plt.show()  

This is what I get:

EDIT: SOLVED

Quang Hoang warned me in comments, the "mistake" to reach my goal was to simply plot inside the loop, so it shows for each value.

Now I got:

   #tuple to select colors of each channel line
   colors = ("red", "green", "blue")
   channel_ids = (0, 1, 2)

  # create the histogram plot, with three lines, one for
  # each color
  plt.xlim([0, 256])
  for channel_id, c in zip(channel_ids, colors):
      histogram, bin_edges = np.histogram(image[:, :, channel_id], bins=256, range=(0, 256))
      plt.plot(bin_edges[0:-1], histogram, color=c)
      plt.xlabel("Color value")
      plt.ylabel("Pixels")
      plt.show()

Finally: