Re: [Matplotlib-users] how to avoid import backend in the batch job?

[Chao Y. <cha...@gm...>]

Hi Ben,

I changed the backend in matplotlibrc file. It works fine. Yet if I don't
want to change the rc file, I guess I must change in the modules where
matplotlib has been imported for the first time?

cheers,

Chao

On Mon, Sep 3, 2012 at 3:30 PM, Benjamin Root <ben...@ou...> wrote:

>
>
> On Monday, September 3, 2012, Chao YUE wrote:
>
>> Dear all,
>>
>> I have a module written by myself which use
>> python-netcdf/matplotlib/numpy/basemap for treating and mapping of netcdf
>> files.
>> so in the module I have a line:
>>
>> import matplotlib.pyplot as plt
>>
>> But now I am using some function of this module which do not involve the
>> visualisation. And I want to use it in a batch mode submitted by qsub
>> command.
>> And then I have traceback like following:
>>
>>   File "/home/orchidee01/ychao/SCRIPT/combine.py", line 1, in <module>
>>     import gnc
>>   File "/home/users/ychao/python/python_lib/gnc.py", line 4, in <module>
>>     import matplotlib.pyplot as plt
>>   File
>> "/usr/local/install/matplotlib-1.1.0/lib64/python2.6/site-packages/matplotlib/pyplot.py",
>> line 95, in <module>
>>     new_figure_manager, draw_if_interactive, _show = pylab_setup()
>>   File
>> "/usr/local/install/matplotlib-1.1.0/lib64/python2.6/site-packages/matplotlib/backends/__init__.py",
>> line 25, in pylab_setup
>>     globals(),locals(),[backend_name])
>>   File
>> "/usr/local/install/matplotlib-1.1.0/lib64/python2.6/site-packages/matplotlib/backends/backend_gtkagg.py",
>> line 10, in <module>
>>     from matplotlib.backends.backend_gtk import gtk, FigureManagerGTK,
>> FigureCanvasGTK,\
>>   File
>> "/usr/local/install/matplotlib-1.1.0/lib64/python2.6/site-packages/matplotlib/backends/backend_gtk.py",
>> line 8, in <module>
>>     import gtk; gdk = gtk.gdk
>>   File "/usr/lib64/python2.6/site-packages/gtk-2.0/gtk/__init__.py", line
>> 64, in <module>
>>     _init()
>>   File "/usr/lib64/python2.6/site-packages/gtk-2.0/gtk/__init__.py", line
>> 52, in _init
>>     _gtk.init_check()
>> RuntimeError: could not open display
>>
>> From the last line, I think this is because I cannot use this module in a
>> non-interactive mode. So is there a way I can bypass this issue and still
>> use the module in a non-interactive mode? Thanks a lot for any
>> information.
>>
>> Chao
>>
>>
> import matplotlib
> matplotlib.use("AGG")
>
> Or set that in the matplotlibrc file.
>
> Cheers,
> Ben Root
>



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Chao YUE
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