2015-09-20 8:44 GMT+02:00 Serhiy Storchaka <storch...@gmail.com>:
> I propose to make the default value of stacklevel to be 2.
> I think that unlikely this will break existing code.
Consider this simple script:
---
import warnings
warnings.warn("here")
---
Currrent output:
---
x.py:3: UserWarning: here
warnings.warn("here")
---
=> it shows the script name (x.py), the line number and the line, as expected.
Now try stacklevel=2:
---
import warnings
warnings.warn("here", stacklevel=2)
---
New output:
---
sys:1: UserWarning: here
---
"sys:1" is not really useful :-/
I would describe this as a regression, not an enhancement.
It's hard to find a "good" default value. It's better to always
specify stacklevel :-)
Victor
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