Re: return from function

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From	Denis McMahon <denismfmcmahon@gmail.com>
Newsgroups	comp.lang.python
Subject	Re: return from function
Date	Tue, 22 Dec 2015 14:23:33 -0000 (UTC)
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On Sun, 20 Dec 2015 12:34:40 +0000, Emil Natan wrote:

> I'm completely new to Python.

>     parent_domain = domainname.partition('.')[2]
>     try:
>         print('Test for parent domain %s' % parent_domain)
>         z = dns.resolver.query(parent_domain, 'SOA')
>         print('the parent domain we use is: %s' % parent_domain)
>         return parent_domain
>     except dns.resolver.NXDOMAIN:
>         print('NXDOMAIN: invoke find_parent_domain recursively')
>         find_parent_domain(parent_domain)

None is being returned in this case!

>     except dns.resolver.NoAnswer:
>         print('NoAnswer: invoke find_parent_domain recursively')
>         find_parent_domain(parent_domain)

And in this case.

Do you want to return None in the NXDOMAIN and NoAnswer cases? If not, a 
return statement might help in returning a value.

When you recurse back into a function you still need to return the result 
of the recursion.

-- 
Denis McMahon, denismfmcmahon@gmail.com

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return from function Emil Natan <shlyoko@gmail.com> - 2015-12-20 12:34 +0000
  Re: return from function Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-12-21 12:07 +0000
  Re: return from function Denis McMahon <denismfmcmahon@gmail.com> - 2015-12-22 14:23 +0000

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