Each release of Debian has a shiny new theme, which is visible on the boot screen, the login screen and, most prominently, on the desktop wallpaper.
Debian plans to release Stretch next year. As ever, we need your help in creating its theme! You have the opportunity to design a theme that will inspire thousands of people while working in their Debian systems.
They might be people working in exciting NASA missions:
Or DYI users who decided to make a matching keyboard:
If you're interested, please take a look at https://wiki.debian.org/DebianDesktop/Artwork/Stretch
Every Python programmer knows to avoid mutable default arguments:def fn(mutable=): mutable.append('elem') print mutable fn() fn() $ python test.py ['elem'] ['elem', 'elem']
However, many are not clear that this is due to arguments being evaluated at import time, rather than the first time the function is evaluated.
This results in related quirks such as:def never_called(error=1/0): pass $ python test.py Traceback (most recent call last): File "test.py", line 1, in <module> ZeroDivisionError: integer division or modulo by zero
... and an—implementation-specific—quirk caused by naive constant folding:def never_called(): 99999999 ** 9999999 $ python test.py [hangs]
I suspect that this can be used as denial-of-service vector.