First, sorry for the long email. I'm having a segmentation fault problem trying to use plot_date, somewhere deep in matplotlib. After giving up trying to figure out what was going wrong from within my "real" code, I wrote a "minimal" sample to try to reproduce (or not) the problem; here it is:
import datetime as dt import wx import matplotlib as mpl import wxmpl class PlotPanel(wxmpl.PlotPanel): def __init__(self, parent, *args, **kwargs): wxmpl.PlotPanel.__init__(self, parent, wx.ID_ANY, *args, **kwargs) self.set_crosshairs(False) self.Figure = self.get_figure() ax = self.Figure.add_subplot(111) ax.clear() ax.grid(False) zerodate = dt.datetime(2001,2,15) zero = mpl.dates.date2num(zerodate) x = range(int(zero), int(zero)+11) ax.plot_date(x,x) # Problem line; works fine with plot instead of plot_date self.draw() class MainFrame(wx.Frame): def __init__(self, *args, **kwargs): wx.Frame.__init__(self, *args, **kwargs) self.PlotPanel = PlotPanel(self) self.MainBox = wx.BoxSizer(wx.VERTICAL) self.MainBox.Add(self.PlotPanel, 1, wx.EXPAND ) self.SetSizerAndFit(self.MainBox) class App(wx.App): def OnInit(self): self.frame = MainFrame(None) self.SetTopWindow(self.frame) self.frame.Fit() self.frame.Show() return True if __name__ == "__main__": print wx.__version__ print wxmpl.__version__ print mpl.__version__ app = App(0) app.MainLoop() This code runs fine with plot instead of plot_date (just like my original code with the same substitution). But with plot_date, I get (please note the versions I'm using): wx.__version__ = 2.6.3.3 wxmpl.__version__ = 1.2.7 matplotlib.__version__ = 0.87.4 Traceback (most recent call last): File "debugplot_date.py", line 40, in ? app = App(0) File "//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wx/_core.py", line 7700, in __init__ self._BootstrapApp() File "//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wx/_core.py", line 7352, in _BootstrapApp return _core_.PyApp__BootstrapApp(*args, **kwargs) File "debugplot_date.py", line 30, in OnInit self.frame = MainFrame(None) File "debugplot_date.py", line 23, in __init__ self.PlotPanel = PlotPanel(self) File "debugplot_date.py", line 18, in __init__ self.draw() File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wxmpl.py", line 1189, in draw else: File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/backends/backend_wxagg.py", line 61, in draw FigureCanvasAgg.draw(self) File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/backends/backend_agg.py", line 391, in draw self.figure.draw(renderer) File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/figure.py", line 532, in draw for a in self.axes: a.draw(renderer) File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/axes.py", line 1045, in draw a.draw(renderer) File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/axis.py", line 548, in draw majorLabels = [self.major.formatter(val, i) for i, val in enumerate(majorLocs)] File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/dates.py", line 369, in __call__ return self._formatter(x, pos) File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/dates.py", line 247, in __call__ dt = num2date(x, self.tz) File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/dates.py", line 205, in num2date if not iterable(x): return _from_ordinalf(x, tz) File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/dates.py", line 156, in _from_ordinalf hour, remainder = divmod(24*remainder, 1) ValueError: need more than 0 values to unpack Using winpdb, I determined that this line in dates.py get called 13 times before, on the 14th time, it causes a "communication failure" between winpdb and the code. Any ideas what's up? Thanks in advance, DG PS: I'm on a Mac, running system 10.4.7 with Python 2.4.3 (#1, Apr 7 2006, 10:54:33) [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users