Building loop with some exceptions?

[Matimus]

On Nov 4, 11:20 am, Gilles Ganault <nos... at nospam.com> wrote:
> Hello
>
> I need to call a URL through a loop that starts at 01 and ends at 99,
> but some of the steps must be ignored:
>
> =====
> url = "http://www.acme.com/list?code="
> p = re.compile("^(\d+)\t(.+)$")
>
> for i=01 to 99 except 04, 34, 40, 44, 48, 54, 57, 67, 76, 83, 89:
>         f = urllib.urlopen(url + i)
>         page = f.read()
>         f.close()
>
>         for line in page:
>                 m = p.search(line)
>                 if m:
>                         code = m.group(1)
>                         label = m.group(2)
>
>                         print "Code=" + code + " # Label=" + label
> =====
>
> I'm clueless at what the Python way is to do this :-/
>
> Thank you for any help.

I would just do something like this (not tested):

url_tmpl = "http://www.acme.com/list?code=%02d"
p = re.compile("^(\d+)\t(.+)$")
EXCLUDED_VALUES = 4, 34, 40, 44, 48, 54, 57, 67, 76, 83, 89

for i in xrange(1,100):
    if i in EXCLUDED_VALUES:
        continue
    f = urllib.urlopen(url_tmpl % i)
    try:
        for line in f:
            m = p.search(line)
            if m:
                code = m.group(1)
                label = m.group(2)

                print "Code=", code, "# Label=", label
    finally:
        f.close()