On 5/25/2013 12:37 PM, klo uo wrote:
> Out of the blue, I started getting this messages while plotting with MPL
> 1.2.1:
>
> ========================================
> Traceback (most recent call last):
>    File
> "C:\Python27\lib\site-packages\matplotlib\backends\backend_qt4.py", line
> 244, in mouseMoveEvent
>      FigureCanvasBase.motion_notify_event( self, x, y )
>    File "C:\Python27\lib\site-packages\matplotlib\backend_bases.py",
> line 1724, in motion_notify_event
>      self.callbacks.process(s, event)
>    File "C:\Python27\lib\site-packages\matplotlib\cbook.py", line 343,
> in process
>      proxy(*args, **kwargs)
>    File "C:\Python27\lib\site-packages\matplotlib\cbook.py", line 215,
> in __call__
>      mtd = new.instancemethod(self.func, self.inst(), self.klass)
> AttributeError: 'module' object has no attribute 'instancemethod'
> ========================================
>
> I didn't install any new package or change my Python installation in any
> way, which makes this hard for me to solve. The message appears when I
> move my mouse pointer inside plot window. I first removed matplotlibrc
> from my "home" folder, and it happens again regardless backend changed
> this way from wx to tk (which is default). I set backend to qt4 also,
> but it's just the same.
>
> Any ideas?
>

There is likely a `new` module in sys.path that shadows Python's builtin 
new module. Add a `import new;print(new.__file__)` statement at the top 
of your script. It should output 'X:\\Python27\\lib\\new.pyc'

Christoph


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