strange test for None

[karoly.kiripolszky]

the tested variable was really a string containing "None" instead of
simply None. this is the first time i ran into this error message
confusion. :)

thanks for the help!

On Feb 3, 6:29 pm, Michael Bentley <rmc... at gmail.com> wrote:
> On Feb 3, 2007, at 7:47 AM, karoly.kiripolszky wrote:
>
> > in my server i use the following piece of code:
>
> >             ims = self.headers["if-modified-since"]
> >             if ims != None:
> >                 t = int(ims)
>
> > and i'm always getting the following error:
>
> >     t = int(ims)
> > ValueError: invalid literal for int(): None
>
> > i wanna know what the hell is going on... first i tried to test using
> > is not None, but it makes no difference.
>
> Sounds like ims == 'None'.  Try changing:
>
> if ims != None:
>
> to
>
> if ims:
>
> and you might also wrap your call to int(ims) in a try block.
>
> HTH,
> Michael