best way to do a series of regexp checks with groups

[Mark Fanty]

This is the kind of thing I meant.  I think I have to get used to writing 
small, light-weight classes.   You inspired this variation which is a little 
more verbose in the class definition, but less so in the use:

class Matcher:
  def search(self, r,s):
    self.value = re.search(r,s)
    return self.value
  def __getitem__(self, i):
    return self.value.group(i)

m = Matcher()

if m.search(r'add (\d+) (\d+)', line):
  do_add(m[1], m[2])
elif m.search(r'mult (\d+) (\d+)', line):
  do_mult(m[1], m[2])
elif m.search(r'help (\w+)', line):
  show_help(m[1])

As for using regular expressions too much... they are why I've liked perl so 
much for quick file processing for years.  I don't like perl objects at all, 
which is why I'm trying python, but the re package has not been my favorite 
so far...

"Nick Craig-Wood" <nick at craig-wood.com> wrote in message 
news:slrncv8ar0.m68.nick at irishsea.home.craig-wood.com...
>
> There was a thread about this recently under the title
>
>  "regular expression: perl ==> python"
>
> Here is a different solution...
>
> class Result:
>    def set(self, value):
>        self.value = value
>        return value
>
> m = Result()
>
> if m.set(re.search(r'add (\d+) (\d+)', line)):
>    do_add(m.value.group(1), m.value.group(2))
> elif m.set(re.search(r'mult (\d+) (\d+)', line)):
>    do_mult(m.value.group(1), m.value.group(2))
> elif m.set(re.search(r'help (\w+)', line)):
>    show_help(m.value.group(1))
>
> -- 
> Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick