title: Python Matplotlib add Colorbar
body: <p>i've got a problem using MatlobLib with "Custom" Shapes from a shapereader. Importing and viewing inserted faces works fine, but i'm not able to place a colorbar on my figure.</p>
  
  <p>I already tried several ways from the tutorial, but im quite sure there is a smart solution for this problem.</p>
  
  <p>maybe somebody can help me, my current code is attached below:</p>
  
  <pre><code>from formencode.national import pycountry
  import itertools
  from matplotlib import cm, pyplot
  from matplotlib import 
  from mpl_toolkits.basemap import Basemap
  from numpy.dual import norm
  import cartopy.crs as ccrs
  import cartopy.io.shapereader as shpreader
  import matplotlib as mpl
  import matplotlib.colors as colors
  import matplotlib.mlab as mlab
  import matplotlib.pyplot as plt
  import numpy as np
  
  def draw_map_for_non_normalized_data_with_alpha2_counrty_description(data, title=None):
  
  m = Basemap()
  ax = plt.axes(projection=ccrs.PlateCarree())
  
  list = []
  sum = 0
  for key in data:
      sum += data[key]
  
  for key in data.keys():
      new_val = (data[key]+0.00)/sum
      list.append(new_val)
      data[key] = new_val
  
  #===========================================================================
  # print str(min(list))
  # print str(max(list))
  #===========================================================================
  
  cmap = mpl.cm.cool
  colors = matplotlib.colors.Normalize(min(list)+0.0, max(list)+0.0)
  
  labels = []
  features = []
  for country in shpreader.Reader(shapename).records():
      a3_code = country.attributes["gu_a3"]
      try :
          a2_code =  pycountry.countries.get(alpha3=a3_code).alpha2
      except:
          a2_code = ""
  
      if a2_code in data:
          val = data[a2_code]
  
          color = cm.jet(norm(val))
  
          print str(val) + " value for color: " + str(color)
  
          labels.append(country.attributes['name_long'])
          feat = ax.add_geometries(country.geometry, ccrs.PlateCarree(), facecolor=color, label=country.attributes['name_long'])
  
          features.append(feat)   
  #ax.legend(features, labels, loc='upper right')
  #===========================================================================
  # fig = pyplot.figure(figsize=(8,3))    
  # ax1 = fig.add_axes([0.05, 0.80, 0.9, 0.15])
  #===========================================================================
  
  #cbar = m.colorbar(location='bottom')
  cb1 = mpl.colorbar.ColorbarBase(ax, cmap=cmap,norm=colors,orientation='horizontal')
  cb1.set_label('foo')
  
  m.drawcoastlines()
  m.drawcountries()
  if title:
      plt.title(title)
  
  plt.show() 
  </code></pre>
  
  <p>as you can see inside the code, i already tried several ways, but none of them worked for me.</p>
  
  <p>maybe somebody has "the" hint for me.</p>
  
  <p>thanks for help,</p>
  
  <p>kind regards</p>