[gdal-dev] Possible SWIG Python bug

[Leonardo Piga]

I'm working on creating an autotest for OGR GTM driver, I just started
the work and I faced a little problem with the script run_all.py.
I've already solved the problem, however, since I'm not a Python
expert, I'm reporting the problem that I had. If it is not a bug,
please excuse me.

I've checked out and installed gdal from source. I've checked out
autotest scripts, too.
When I ran run_all.py I got the following message:

Traceback (most recent call last):
  File "run_all.py", line 30, in <module>
    import gdaltest
  File "pymod/gdaltest.py", line 35, in <module>
    from osgeo import gdal
  File "/usr/local/lib/python2.6/dist-packages/osgeo/__init__.py",
line 21, in <module>
    _gdal = swig_import_helper()
  File "/usr/local/lib/python2.6/dist-packages/osgeo/__init__.py",
line 20, in swig_import_helper
    return _mod
UnboundLocalError: local variable '_mod' referenced before assignment

I took a look at the file
/usr/local/lib/python2.6/dist-packages/osgeo/__init__.py and I saw
that I was having an exception, but the error message was not giving
me any hint. I think there is a bug in __init__.py code, because _mod
is being used without being defined when the exception is raised.


Take a look at these lines:

            try:
                _mod = imp.load_module('_gdal', fp, pathname, description)
            finally:
                fp.close()
                return _mod

Is it really a bug? Is it possible to define _mod before the try and
finally block?

In time, I solved the problem by making LD_LIBRARY_PATH point to
/user/local/lib. So I'm not having the exception anymore and the
problem was solved.

Thanks a lot
-- 
Leonardo de Paula Rosa Piga
http://lampiao.lsc.ic.unicamp.br/~piga