urllib2 and exceptions

[robean]

On Sep 28, 12:11 pm, "Chris Rebert" <c... at rebertia.com> wrote:
> On Sun, Sep 28, 2008 at 11:03 AM, robean <st1... at gmail.com> wrote:
> > Hi everyone,
>
> > I have a question about using urllib2.
>
> > I like urllib2 better than urllib at least in part because it has more
> > elaborate support for handling errors: there is built in support for
> > URLError (for faulty urls) and HTTPError (for http errors that might
> > originate from, say, passing an invalid stock-ticker in the program
> > below).  However I can get neither to work.  I'm attaching below the
> > (very short) code: can anyone point out what I'm doing wrong?
>
> > Now, if I replace the URLError and HTTPError with IOError (the class
> > from which both URLError and HTTPError inherit), the program works
> > fine. Why is it that I can call the generic IOError class, but none of
> > the Error classes derived from that? These are clearly defined in the
> > urllib2 manual. Very confused...
>
> > Here's the code:
>
> > import urllib2
>
> > # read stock information from yahoo finance for Traget (TGT)
> > goodTicker = 'TGT' # program works with this
> > badTicker = 'TGTttttttt' # python doesn't understand either HTTPError
> > or URLError with this
>
> > url = "http://ichart.finance.yahoo.com/table.csv?s=" + badTicker
>
> > try:
> >        handle = urllib2.urlopen(url)
>
> > # this does not work
> > except HTTPError, e:
> >        print "There was an http error"
> >        print e
>
> > # this also does not work
> > except URLError, e:
> >        print "There is a problem with the URL"
> >        print e
> >        exit(1)
>
> > #this works
> > except IOError, e:
> >        print "You have an IOError"
> >        print e
>
> > text = handle.readlines()[:20]
> > for line in text:
> >        print line
>
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> My Python begs to differ:
>
> #tmp.py
> import urllib2
>
> badTicker = 'TGTttttttt'
> url = "http://ichart.finance.yahoo.com/table.csv?s=" + badTicker
>
> try:
>     handle = urllib2.urlopen(url)
>
> except urllib2.HTTPError, e:
>     print "There was an http error"
>     print e
>
> except urllib2.URLError, e:
>     print "There is a problem with the URL"
>     print e
>
> except urllib2.IOError, e:
>     print "You have an IOError"
>     print e
>
> #in the shell
> $ python -V
> Python 2.5.1
> $ python Desktop/tmp.py
> There was an http error
> HTTP Error 404: Not Found
>
> Are you using an outdated version of Python perhaps?
>
> Regards,
> Chris
>
> --
> Follow the path of the Iguana...http://rebertia.com

Then I expect that it is most likely my version of python that is
causing the problem. I'm using 2.5.2.