title: Displaying Legend in Matplotlib Basemap
body: <p>I have a basemap plotted using the following code snippet:</p>
  
  <pre><code>#setting the size
  plt.figure(figsize=(20,10))
  #iterating through each country in shape file and filling them with color assigned using the colors array
  for nshape,seg in enumerate(m.countries):
  #getting x,y co-ordinates
       xx,yy = zip(*seg)
  #getting the corresponding color
       color = colors[countryisos[nshape]]
  #plotting them on the map
       plt.fill(xx,yy,color,edgecolor=color)
  #setting the parallels with 10 degree interval from -90 to 90 degrees  
  parallels = np.arange(-80.,81,10.)
  m.drawparallels(parallels,labels=[True,True,True,True])
  #setting the meridians with 20 degree interval from -180 to 180 degrees
  meridians = np.arange(10.,351.,20.)
  m.drawmeridians(meridians,labels=[True,False,False,True])
  #setting the title for the plot
  plt.title('Number of Disasters by Country: 1981-2014')
  </code></pre>
  
  <p>Three colours are assigned to colors array using this function.</p>
  
  <pre><code>colors={}
  #iterating through each country in shape file and setting the corresponding color
  for s in countryisos:
      if countvalues[s]&lt;=200:
        colors[s] = 'orange'
      elif countvalues[s]&gt;200 and countvalues[s]&lt;=400:
        colors[s] = 'yellow'
      else:
        colors[s] = 'red'
  </code></pre>
  
  <p>How can set a legend for this plot showing three colours each defining a range? I cannot use 'label' parameter inside plot function since it is in a for loop.</p>