warnings filter?

Peter Otten __peter__ at web.de
Fri Jul 9 21:33:04 CEST 2004

rob at encodia.biz wrote:

> In Python 2.3, this code still prints a warning (when run as a script,
> not from the interpreter).  How do I get rid of the warning?  I'd like
> to do it without passing command line args to python.
> import warnings
> warnings.filterwarnings('ignore')
> a = 0xffffffff

The warning is issued during the compilation, not the execution of your
script. Therefore the attempt to turn off the warning, although before the
offensive statement, comes too late.

a = 0xffffffff

One workaround is to precompile offensive.py (By the way is there a flag to
do this that I've overlooked?):

$ python -c"import offensive"
offensive.py:1: FutureWarning: hex/oct constants > sys.maxint will return
positive values in Python 2.4 and up
  a = 0xffffffff

and then invoke offensive.pyc:

$ python offensive.pyc

All quiet :-)

The other option would be to reorganize your script to the same effect.

$ rm offensive.pyc
$ python driver.py

Where driver looks like so:

import warnings
warnings.filterwarnings('ignore') # should probably be more specific

import offensive

Of course you could omit the first two lines when you can live with a
warning the first time you run driver.py after every change of


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