python - WxPython wxSplitterWindow.SplitVertically always shows uneven split -

i'm trying understand how use wxsplitterwindow class can't seem vertical split (i.e. left , right panes each take same amount of space). according wxpython 3.03 documentation, wxsplitterwindow.splitvertically has following signature:

splitvertically(self, window1, window2, sashposition=0) 

the last parameter sashposition has following description:

sashposition - initial position of sash. if value positive, specifies size of left pane. if negative, absolute value gives size of right pane. finally, specify 0 (default) choose default position (half of total window width).

from description, gather passing 0 sashposition splits window in half left , right panes taking equal space. however, when run following example program, window uneven split of left panel hidden.

import wx  class splitterframe(wx.frame):      def __init__(self):          wx.frame.__init__(self, none, title='splitterwindow example')          # create main splitter window (to split vertically)         self.splitter = wx.splitterwindow(self)         self.rightpanel = wx.panel (self.splitter)         self.rightpanel.setbackgroundcolour(wx.blue)         self.leftpanel = wx.panel (self.splitter)         self.leftpanel.setbackgroundcolour(wx.red)          # expecting split call                 self.splitter.splitvertically (self.leftpanel, self.rightpanel, 0)  if __name__ == '__main__':     app = wx.app(0)     frame = splitterframe()     frame.show()     app.mainloop() 

i'm running python v2.7.10 using wxpython v3.0 toolkit on windows 8.1 machine.

i had same problem, trial, , error modification solved problem

self.splitter.splithorizontally(self.leftpanel, self.rightpanel, 100) 

but dependent on size of frame.

i'm using wxpython version 3.0.0.0