Traceback (most recent call last):
  File "/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7/site-packages/wx-2.8-mac-unicode/wx/_core.py", line 14669, in <lambda>
    lambda event: event.callable(*event.args, **event.kw) )
  File "/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7/site-packages/wx-2.8-mac-unicode/wx/_controls.py", line 1843, in AppendText
    return _controls_.TextCtrl_AppendText(*args, **kwargs)
UnicodeDecodeError: 'ascii' codec can't decode byte 0x97 in position 2: ordinal not in range(128)