Re: Catching AttributeError exceptions in widget media

I simply didn't believe it at first, but sure enough, in python 2.7:

>>> class Bomb(object):
...     def __getattr__(self, id):
...         assert False
...  
>>> bomb = Bomb()
>>> bomb.foo
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in __getattr__
AssertionError
>>> hasattr(bomb, 'foo')
False

Thankfully Python 3 fixes this. One more reason to switch, I guess.

On Thursday, September 4, 2014 12:04:36 PM UTC-4, Collin Anderson wrote:

believe it or not, hasattr is the same as:

try:

    getattr(obj, name)

    return True

except:  # yikes! naked except!

    return False

https://docs.python.org/2/library/functions.html#hasattr

So, excepting AttributeError will at least narrow down the error slightly, rather than hasattr accepting _any_ exception.

On Thu, Sep 4, 2014 at 4:29 AM, Michael Jones <m.pric...@gmail.com> wrote:

Hi,

Thanks for the reply, but I'm not sure I follow. I was hoping that the following might work:

    if hasattr(sup_cls, 'media'):
        base = sup_cls.media
    else:

        base = Media()

Would that swallow additional exceptions?

Cheers,

Michael

On Wednesday, September 3, 2014 10:45:22 PM UTC+1, Collin Anderson wrote:

unfortunately hasattr eats even more exceptions than AttributeError.

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