TypeError: CXX: type error. in text.py draw_text


I have installed matplotlib-0.80 on WinXP and when I run a Python script that calls pylab.plot
several times after a while the program ends with the error message listed below. I inserted some print statements into backend_agg.py and text.py (code snippets see below). As far as I can see the problem is with the function xy_tup that returns (70.0555555556, -3509680569.77) when given the input (-0.030476944389471572, -0.012864052691159839).

My workaround is to set:

    self._renderer.draw_text(font, int(x), int(y), gc)

in backend_agg.py

Is there anything I can do instead to avoid this error message?

With kind regards

Rolf Wester




    def draw(self, renderer):
               bbox, info = self._get_layout(renderer)
-> print "draw ", info,
        for line, wh, x, y in info:
            x, y = self._transform.xy_tup((x, y))
-> print x,y," / ",
            #renderer.draw_arc(gc, (1,0,0),
            # x, y, 2, 2, 0.0, 360.0)

            if renderer.flipy():
                canvasw, canvash = renderer.get_canvas_width_height()
                y = canvash-y
-> print y, canvash
                       renderer.draw_text(gc, x, y, line,
                               self._fontproperties, angle,


    def draw_text(self, gc, x, y, s, prop, angle, ismath):
        Render the text
        if __debug__: verbose.report('RendererAgg.draw_text', 'debug-annoying')

        if ismath:
            return self.draw_mathtext(gc, x, y, s, prop, angle)

        font = self._get_agg_font(prop)
        if font is None: return None
        if len(s)==1 and ord(s)>127:

            font.set_text(s, angle)
-> print font, int(x), int(y), gc
        self._renderer.draw_text(font, int(x), int(y), gc)



draw [('0', (7.0, 10.0), -0.030476944389471572, -0.012864052691159839)] 70.0555555556 -3509680569.77 / 3509681061.77 492.0
<FT2Font object at 0x0132DEAC> 70 3509681061 <matplotlib.backend_bases.GraphicsContextBase instance at 0x1B340F80>

Traceback (most recent call last):
  File "E:\work\trumpf\kaustikopti6659mmAK2ma.py", line 238, in -toplevel-
    intensity_nf, intensity_ff = opt_resonator_online(GRIDLIST, OELIST, outcoupler, SEQUENCELIST1, SEQUENCELIST2, no_fc, init_kind, nit, nav, verbose=verbose, plot = plot, genplot = gen_plot)
  File "D:\PROGLA~1\Python23\lib\site-packages\OPT\opt_resonator.py", line 473, in opt_resonator_online
    if plot: genplot.plot_slice(fc_outcouple, ifigure = 2, clear = 'yes', nr = 1, nc = 2, nf = 1, slice = 1, xlabel = '$r$', i=0, ylabel = '$Intensity$', title = '$nearfield$')
  File "D:\PROGLA~1\Python23\lib\site-packages\OPT\opt_graphics.py", line 507, in plot_slice
    xlabel = xlabel, ylabel = ylabel, title = title)
  File "D:\PROGLA~1\Python23\lib\site-packages\OPT\opt_graphics.py", line 560, in plot_slice_matplotlib
  File "D:\PROGLA~1\Python23\Lib\site-packages\matplotlib\pylab.py", line 1900, in plot
  File "D:\PROGLA~1\Python23\Lib\site-packages\matplotlib\backends\backend_tkagg.py", line 58, in draw_if_interactive
  File "D:\PROGLA~1\Python23\Lib\site-packages\matplotlib\backends\backend_tkagg.py", line 292, in show
  File "D:\PROGLA~1\Python23\Lib\site-packages\matplotlib\backends\backend_tkagg.py", line 146, in draw
  File "D:\PROGLA~1\Python23\lib\site-packages\matplotlib\backends\backend_agg.py", line 312, in draw
  File "D:\PROGLA~1\Python23\Lib\site-packages\matplotlib\figure.py", line 395, in draw
    for a in self.axes: a.draw(renderer)
  File "D:\PROGLA~1\Python23\Lib\site-packages\matplotlib\axes.py", line 1362, in draw
  File "D:\PROGLA~1\Python23\Lib\site-packages\matplotlib\axis.py", line 524, in draw
  File "D:\PROGLA~1\Python23\Lib\site-packages\matplotlib\axis.py", line 141, in draw
    if self.label1On: self.label1.draw(renderer)
  File "D:\PROGLA~1\Python23\lib\site-packages\matplotlib\text.py", line 332, in draw
  File "D:\PROGLA~1\Python23\lib\site-packages\matplotlib\backends\backend_agg.py", line 211, in draw_text
    self._renderer.draw_text(font, int(x), int(y), gc)
TypeError: CXX: type error.

Rolf Wester