wx.lib.plot Traceback

Hello,
I played with wxPython Phoenix demo on W10

with PyPlot if i Enable Legend I have this Traceback:

File “C:\Program Files\Python35\lib\site-packages\wx\lib\plot\plotcanvas.py”, line 1889, in _Draw
legendTextExt)
File “C:\Program Files\Python35\lib\site-packages\wx\lib\plot\plotcanvas.py”, line 2240, in _drawLegend
if isinstance(o, PolyMarker) or isinstance(o, BoxPlot):
NameError: name ‘PolyMarker’ is not defined

Regards
Jo