embeding basemap in Tk

How do I embed basemap in Tk? I tried following the matplotlib example. But the following does not work (the earth does not appear):

import matplotlib
matplotlib.use(‘TkAgg’)

from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
from matplotlib.figure import Figure
from mpl_toolkits.basemap import Basemap

import Tkinter as Tk

root = Tk.Tk()
root.wm_title(“Embedding in TK”)

f = Figure()#figsize=(5,4), dpi=100)

map = Basemap(projection=‘ortho’, lat_0=34.0,lon_0=-117.3, resolution=‘l’ area_thresh=1000.)

map.drawcoastlines()
map.drawcountries()
map.fillcontinents(color=‘coral’)
map.drawmapboundary()

canvas = FigureCanvasTkAgg(f, master=root)
canvas.show()
canvas.get_tk_widget().pack(side=Tk.TOP,
fill=Tk.BOTH, expand=1)

toolbar = NavigationToolbar2TkAgg( canvas, root )
toolbar.update()
canvas._tkcanvas.pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)

Tk.mainloop()

thanks…

Marc Desmarais

Long Beach, CA, 90814