[matplotlib-devel] new bug?

[Eric F. <ef...@ha...>]

John,

I think that the following change, from API_CHANGES, is causing trouble:

     made pos=None the default for tick formatters rather than 0 to
     indicate "not supplied"

The symptom is that running (for example) contour_demo.py from the 
command line with gtkagg backend, I often, but not always, get a blast 
of errors like this:

Traceback (most recent call last):
   File 
"/usr/lib/python2.4/site-packages/matplotlib/backends/backend_gtk.py", 
line 188, in motion_notify_event
     FigureCanvasBase.motion_notify_event(self, x, y)
   File "/usr/lib/python2.4/site-packages/matplotlib/backend_bases.py", 
line 797, in motion_notify_event
     func(event)
   File "/usr/lib/python2.4/site-packages/matplotlib/backend_bases.py", 
line 1085, in mouse_move
     try: s = event.inaxes.format_coord(event.xdata, event.ydata)
   File "/usr/lib/python2.4/site-packages/matplotlib/axes.py", line 612, 
in format_coord
     ys = self.format_ydata(y)
   File "/usr/lib/python2.4/site-packages/matplotlib/axes.py", line 605, 
in format_ydata
     val =  func(y)
   File "/usr/lib/python2.4/site-packages/matplotlib/ticker.py", line 
152, in format_data
     return self.__call__(value)
   File "/usr/lib/python2.4/site-packages/matplotlib/ticker.py", line 
178, in __call__
     else: return self.seq[pos]
TypeError: list indices must be integers


pos=None would certainly cause this...but I haven't checked it.

(System is stock Mandriva 2006; mpl is CVS.)

Eric