'Polygon' object has no attribute '_paths'

There is a problem on pylab ,Windows

Traceback (most recent call last):

File “…\basemap-0.9.5\examples\plot_tissot.py”, line 59, in

m.drawmapboundary()

File “C:\Python25\Lib\site-packages\matplotlib\toolkits\basemap\basemap.py”, line 1227, in drawmapboundary

ax.add_collection(bound)

File “C:\Python25\Lib\site-packages\matplotlib\axes.py”, line 1320, in add_collection

if collection._paths and len(collection._paths):

AttributeError: ‘Polygon’ object has no attribute ‘_paths’