how to get wx.choice.GetStringSelection() for strings which includes special character like µ

Hello everyone,

I am using
python 2.6
wxPython 2.8.12.1

to get string from wx.choice box i am using following code

mystringvalue = self.panels[i].chcchoice.GetStringSelection()

it works fine if wx.choice contains only alphanumerical characters.

it;s giving error when i am using special character like µ
and in this case giving error as
UnicodeEncodeError: ‘ascii’ codec can’t encode character u’\xb5’
in position 9: ordinal not in range(128)
Can anyone help to resolve this.

Thanks