On 2008-04-30 18:42, Sean Ryan wrote:
Hi all,
(A similar question was posted by a colleague, but did not appear to reach
comp.lang.python or this list).
I am wondering if the -v option causes the python application to be more
tolerant to module import warnings and / or errors.
The reason is that a module is failing to import correctly (generating an
ImportError exception). Examining this closer we re-ran the script using
the -v option. to find that "Unsatisfied symbol" errors we being displayed
during import (cx_Oracle 4.3.1, python 2.5.1, HP-UX 11, oracle 9.2).
However, the module is usable from the python prompt (when using -v)
displayed, i.e. dir (cx_Oracle) works correctly, as does database
interaction. Without the -v option the script is halted due to the
ImportError exception.
My questions are:
1. Is there a way to mimic the seemingly more tolerant import behavior of
python -v without producing the verbose output ?
2. Is the behavior described above expected and documented ?
The -v option only causes Python to print more information to
stderr explaining where it is looking for modules.
You should be seeing any dynamic loader messages in both cases,
ie. when running with or without -v.
While it is possible that cx_Oracle does some extra processing
when running Python in -v mode, this is rather unlikely.
Note that the best way to track down "unsatified symbol" errors
is to inspect the dependencies of the modules and other shared
libs involved.
Running an strace (or similar system trace utility) will also
help to identify the problem, since this lists the shared libs
the process tries to load when starting up and also during
import of Python modules.
--
Marc-Andre Lemburg
eGenix.com
Professional Python Services directly from the Source (#1, May 01 2008)
>>> Python/Zope Consulting and Support ... http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/
________________________________________________________________________
:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::
eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48
D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
Registered at Amtsgericht Duesseldorf: HRB 46611
--
http://mail.python.org/mailman/listinfo/python-list
