On Monday 15 January 2007 12:16 am, Steve Chaplin wrote: > On Thu, 2007年01月11日 at 00:01 -0700, Fernando Perez wrote: > > On 1/10/07, Steve Chaplin <ste...@ya...> wrote: > > > On Mon, 2007年01月08日 at 11:24 -0500, Darren Dale wrote: > > > > I had to alter the following lines from backend_gtkcairo, from > > > > > > > > import matplotlib.backends.backend_cairo as be_cairo > > > > from matplotlib.backends.backend_gtk import * > > > > > > > > to > > > > > > > > import backend_cairo as be_cairo > > > > from backend_gtk import * > > > > > > > > in order to prevent the following traceback: > > > > > > > > Traceback (most recent call last): > > > > File "/usr/bin/ipython", line 27, in ? > > > > IPython.Shell.start().mainloop() > > > > File "/usr/lib64/python2.4/site-packages/IPython/Shell.py", line > > > > 1034, in start > > > > return shell(user_ns = user_ns) > > > > File "/usr/lib64/python2.4/site-packages/IPython/Shell.py", line > > > > 945, in __init__ > > > > shell_class=MatplotlibMTShell) > > > > File "/usr/lib64/python2.4/site-packages/IPython/Shell.py", line > > > > 622, in __init__ > > > > on_kill=[mainquit]) > > > > File "/usr/lib64/python2.4/site-packages/IPython/ipmaker.py", line > > > > 90, in make_IPython > > > > embedded=embedded,**kw) > > > > File "/usr/lib64/python2.4/site-packages/IPython/Shell.py", line > > > > 506, in __init__ > > > > user_ns,b2 = self._matplotlib_config(name,user_ns) > > > > File "/usr/lib64/python2.4/site-packages/IPython/Shell.py", line > > > > 397, in _matplotlib_config > > > > from matplotlib import backends > > > > File > > > > "/usr/lib64/python2.4/site-packages/matplotlib/backends/__init__.py", > > > > line 55, in ? > > > > new_figure_manager, draw_if_interactive, show = pylab_setup() > > > > File > > > > "/usr/lib64/python2.4/site-packages/matplotlib/backends/__init__.py", > > > > line 23, in pylab_setup > > > > globals(),locals(),[backend_name]) > > > > > > > > File > > > > "/usr/lib64/python2.4/site-packages/matplotlib/backends/backend_gtkca > > > >iro.py", line 11, in ? > > > > import matplotlib.backends.backend_cairo as be_cairo > > > > AttributeError: 'module' object has no attribute 'backends' > > > > > > The original matplotlib code is correct, you should be editing IPython > > > and correcting their bug! > > > > Well, I'd be delighted to correct the ipython bug, if only I > > understood exactly what the problem was... As far as I can see, that > > code in ipython is simply calling > > > > # Initialize matplotlib to interactive mode always > > import matplotlib > > from matplotlib import backends > > > > inside a function (the _matplotlib_config method). I don't see a bug > > in that, but if you provide some pointers, I'll be happy to fix any > > issues that are on ipython's side of the fence. > > Darren reported a "bug" in backend_gtkcairo.py which he has "fixed". My > view is that the lines > from matplotlib.backends import backend_cairo > from matplotlib.backends.backend_gtk import * > work fine when called from the Python prompt. They are using the > absolute package path and are correct and should not be "fixed" to use > relative imports (which is bad style). So if there is a bug it is > elsewhere and from the traceback it looked like ipython is involved. > > The traceback shows that this code is being executed > # a hack to keep old versions of ipython working with mpl > if 'IPython.Shell' in sys.modules: > new_figure_manager, draw_if_interactive, show = pylab_setup() > > which is ipython-specific code. > I don't usually use IPython, but I installed it today and ran a few > simple matplotlib plots with the GTKCairo backend and they worked OK! So > I can't offer more info, perhaps Darren can produce a minimal test case > to isolate the problem. They work ok now, after changing the import statement so that it doesnt rename backend_cairo to be_cairo in the gtkcairo namespace. I can't think of a more minimal example than the one I already provided: starting IPython without the pylab flag and importing matplotlib.backends.backend_gtkcairo. I looked at this for a couple hours last week, and was not able to determine whether it was an IPython bug or a matplotlib bug that is exposed by IPython's magic. I do agree that the absolute path imports are correct and are not the source of the problem. Since a workaround has been committed, I don't think I should spend more time on this issue (unless another problem emerges). Darren