how to convert all warnings to errors?
Alex Martelli
aleax at aleax.it
Tue Oct 1 15:46:28 EDT 2002
Skip Montanaro wrote:
> I thought there was a simple command line flag to turn warnings into
> errors,
> but I can't seem to find it. Pointers?
python -W error
should do it. E.g.:
[alex at arthur alex]$ cat warn.py
import sys, warnings
print 'before'
warnings.warn(' '.join(sys.argv[1:]))
print 'after'
[alex at arthur alex]$ python warn.py one two
before
warn.py:3: UserWarning: one two
warnings.warn(' '.join(sys.argv[1:]))
after
[alex at arthur alex]$ python -W error warn.py one two
before
Traceback (most recent call last):
File "warn.py", line 3, in ?
warnings.warn(' '.join(sys.argv[1:]))
File "/usr/local/lib/python2.2/warnings.py", line 42, in warn
warn_explicit(message, category, filename, lineno, module, registry)
File "/usr/local/lib/python2.2/warnings.py", line 71, in warn_explicit
raise category(message)
UserWarning: one two
[alex at arthur alex]$
More generally, -W lets you specify conditions that warnings must match
as well as actions (such as error) to perform when they do. python -h
mentions this (rather summarily, of course) and the online docs for module
warnings gives more details.
Alex
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