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

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

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

-- 
***********************************************************************************
Chao YUE
Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL)
UMR 1572 CEA-CNRS-UVSQ
Batiment 712 - Pe 119
91191 GIF Sur YVETTE Cedex
Tel: (33) 01 69 08 29 02; Fax:01.69.08.77.16
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