I am trying to build an interactive plot. This should clear the shape by clicking on the axes and drawing a circle in a random place. The code is as follows:
import matplotlib.pyplot as plt import random def draw_circle(event): if event.inaxes: print(event.xdata, event.ydata) plt.cla() a = random.randint(0,100) b = random.randint(0,100) s, = plt.plot(a,b,'o', ms=100, color="blue",visible=True ) plt.show() fig = plt.figure() ax = plt.subplot(111) s, = plt.plot(1,2,'o', ms=100, color="blue",visible=True ) plt.connect("button_press_event", draw_circle) plt.show()
After clicking 42 times, the program is interrupted, and I get the following trace:
Exception in Tkinter callback Traceback (most recent call last): File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1413, in __call__ return self.func(*args) File "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_tkagg.py", line 286, in button_press_event FigureCanvasBase.button_press_event(self, x, y, num, guiEvent=event) File "/usr/lib/pymodules/python2.7/matplotlib/backend_bases.py", line 1632, in button_press_event self.callbacks.process(s, mouseevent) File "/usr/lib/pymodules/python2.7/matplotlib/cbook.py", line 262, in process proxy(*args, **kwargs) File "/usr/lib/pymodules/python2.7/matplotlib/cbook.py", line 192, in __call__ return mtd(*args, **kwargs) File "/home/almarahat/Dropbox/python/GUI/Testing site/test_rt/baud_test.py", line 8, in draw_circle plt.cla() File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 2784, in cla ret = gca().cla() File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 842, in cla spine.cla() File "/usr/lib/pymodules/python2.7/matplotlib/spines.py", line 157, in cla self.axis.cla() File "/usr/lib/pymodules/python2.7/matplotlib/axis.py", line 731, in cla self.reset_ticks() File "/usr/lib/pymodules/python2.7/matplotlib/axis.py", line 744, in reset_ticks self.majorTicks.extend([self._get_tick(major=True)]) File "/usr/lib/pymodules/python2.7/matplotlib/axis.py", line 1553, in _get_tick return XTick(self.axes, 0, '', major=major, **tick_kw) File "/usr/lib/pymodules/python2.7/matplotlib/axis.py", line 141, in __init__ self.tick2line = self._get_tick2line() File "/usr/lib/pymodules/python2.7/matplotlib/axis.py", line 401, in _get_tick2line l.set_transform(self.axes.get_xaxis_transform(which='tick2')) File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 586, in get_xaxis_transform return self.spines['top'].get_spine_transform() File "/usr/lib/pymodules/python2.7/matplotlib/spines.py", line 374, in get_spine_transform self._ensure_position_is_set() File "/usr/lib/pymodules/python2.7/matplotlib/spines.py", line 140, in _ensure_position_is_set self.set_position(self._position) File "/usr/lib/pymodules/python2.7/matplotlib/spines.py", line 365, in set_position self.axis.cla() File "/usr/lib/pymodules/python2.7/matplotlib/axis.py", line 731, in cla self.reset_ticks() File "/usr/lib/pymodules/python2.7/matplotlib/axis.py", line 744, in reset_ticks self.majorTicks.extend([self._get_tick(major=True)]) File "/usr/lib/pymodules/python2.7/matplotlib/axis.py", line 1553, in _get_tick return XTick(self.axes, 0, '', major=major, **tick_kw) File "/usr/lib/pymodules/python2.7/matplotlib/axis.py", line 140, in __init__ self.tick1line = self._get_tick1line() File "/usr/lib/pymodules/python2.7/matplotlib/axis.py", line 383, in _get_tick1line zorder=self._zorder, File "/usr/lib/pymodules/python2.7/matplotlib/lines.py", line 195, in __init__ self._marker = MarkerStyle() File "/usr/lib/pymodules/python2.7/matplotlib/markers.py", line 112, in __init__ self.set_marker(marker) File "/usr/lib/pymodules/python2.7/matplotlib/markers.py", line 171, in set_marker self._recache() File "/usr/lib/pymodules/python2.7/matplotlib/markers.py", line 116, in _recache self._path = Path(np.empty((0,2))) File "/usr/lib/pymodules/python2.7/matplotlib/path.py", line 112, in __init__ if ma.isMaskedArray(vertices): File "/usr/local/lib/python2.7/dist-packages/numpy-1.6.2-py2.7-linux-x86_64.egg/numpy/ma/core.py", line 5683, in isMaskedArray return isinstance(x, MaskedArray) RuntimeError: maximum recursion depth exceeded while calling a Python object
At this point, I'm not sure where the recursion happens and how to alleviate this error.
I understand (from other Q & As) that I could increase the stack limit and get around the problem. However, I do not see this as a solution in this particular case and would like to understand this.
Any help would be appreciated.
Thanks in advance.
Additional Information:
- The main functionality that matters is clearing a figure and drawing something new when you click on the canvas.
- Clicking does not cause this error unless I try to draw something. So, I suspect I'm missing something in matplotlib processing.