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Groups > comp.lang.python > #28085
| From | Dennis Lee Bieber <wlfraed@ix.netcom.com> |
|---|---|
| Subject | Re: Is socket.recvfrom broken in ActiveState Python 3.2? |
| Date | 2012-08-29 22:22 -0400 |
| Organization | > Bestiaria Support Staff < |
| References | <cf594a09-d5d2-4d92-912e-b283f4a2fa07@googlegroups.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.3953.1346293361.4697.python-list@python.org> (permalink) |
On Wed, 29 Aug 2012 17:38:28 -0700 (PDT), bbeacham@desanasystems.com
declaimed the following in gmane.comp.python.general:
>
> However, the line 'data, senderAddr = sock.recvfrom(1024)' does not set the 'senderAddr' to anything.
>
No -- if .recvfrom() didn't return a senderAddr you'd get an error
on the tuple unpack...
>>> d, sa = ("string",)
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
ValueError: need more than 1 value to unpack
> In the code is this line:
> print('RECEIVED:', data, "SENDER:", str(senderAddr))
>
> and this is the output.
> RECEIVED: Hello, world SENDER: None
>
>>> d, sa = ("string", None)
>>> str(sa)
'None'
>>>
So senderAddr was either set to None; or is some object whose
__str__() method returns None... What does repr(senderAddr) give you?
>
> Any ideas. Is this a bug in 'recvfrom'?
Since it is documented that the behavior depends upon the underlying
OS socket implementation, you may need to look at those.
--
Wulfraed Dennis Lee Bieber AF6VN
wlfraed@ix.netcom.com HTTP://wlfraed.home.netcom.com/
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Is socket.recvfrom broken in ActiveState Python 3.2? bbeacham@desanasystems.com - 2012-08-29 17:38 -0700 Re: Is socket.recvfrom broken in ActiveState Python 3.2? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-29 22:22 -0400
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