Neal Becker wrote: > On Friday 16 January 2009, Eric Firing wrote: >> Neal Becker wrote: >>> pylab.plot (xaxis, log10 (the_sum)*10) >>> where xaxis is numpy array, and log10(the_sum)*10 is my own class that is >>> a valid python sequence (it is a c++ wrapper around boost::ublas), gives: >>> File "/usr/lib/python2.5/site-packages/matplotlib-0.98.5.2-py2.5-linux- >>> x86_64.egg/matplotlib/pyplot.py", line 2096, in plot >>> ret = gca().plot(*args, **kwargs) >>> File "/usr/lib/python2.5/site-packages/matplotlib-0.98.5.2-py2.5-linux- >>> x86_64.egg/matplotlib/axes.py", line 3277, in plot >>> for line in self._get_lines(*args, **kwargs): >>> File "/usr/lib/python2.5/site-packages/matplotlib-0.98.5.2-py2.5-linux- >>> x86_64.egg/matplotlib/axes.py", line 394, in _grab_next_args >>> for seg in self._plot_2_args(remaining, **kwargs): >>> File "/usr/lib/python2.5/site-packages/matplotlib-0.98.5.2-py2.5-linux- >>> x86_64.egg/matplotlib/axes.py", line 267, in _plot_2_args >>> if is_string_like(tup2[1]): >>> File "/usr/lib/python2.5/site-packages/matplotlib-0.98.5.2-py2.5-linux- >>> x86_64.egg/matplotlib/cbook.py", line 277, in is_string_like >>> try: obj + '' >>> RuntimeError: check:: failed >>> >>> If I convert the 2nd arg to array, it works: >>> pylab.plot (xaxis, np.array(log10 (the_sum)*10)) >>> >>> Doesn't plot support arbitrary sequences? >> Partial correction to my previous post: >> is_string_like looks for a TypeError or ValueError to be raised. I >> suppose we could look for any exception, since your object raises a >> RuntimeError. >> >> I wonder whether it would be equally effective and more robust if the >> test were >> >> try: '' + obj >> >> instead of the other way around. >> >> Eric > > IIRC, boost::python translates c++ exceptions to RuntimeError. If true, then > it's a lot easier to fix matplotlib than to fix boost::python wrappers.
After poking around a little, I conclude that there is nothing gained by having is_string_like look for particular exceptions, so I will relax that, which should solve your problem with no negative consequences for anything else. I've committed the change to the 98.5 maintenance branch, but I'm having trouble with svnmerge, so I don't know how long it will take to get it into the trunk. Eric ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
