socket module setblocking and settimeout problem

[FrankLing]

BPO	15215
Nosy	@pitrou

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2012-06-28.10:26:26.867>
created_at = <Date 2012-06-28.07:26:18.959>
labels = ['type-bug']
title = 'socket module setblocking and settimeout problem'
updated_at = <Date 2012-06-29.01:18:36.763>
user = 'https://bugs.python.org/FrankLing'

bugs.python.org fields:

activity = <Date 2012-06-29.01:18:36.763>
actor = 'pitrou'
assignee = 'none'
closed = True
closed_date = <Date 2012-06-28.10:26:26.867>
closer = 'pitrou'
components = []
creation = <Date 2012-06-28.07:26:18.959>
creator = 'Frank.Ling'
dependencies = []
files = []
hgrepos = []
issue_num = 15215
keywords = []
message_count = 4.0
messages = ['164225', '164236', '164310', '164311']
nosy_count = 2.0
nosy_names = ['pitrou', 'Frank.Ling']
pr_nums = []
priority = 'normal'
resolution = 'wont fix'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue15215'
versions = ['Python 2.7']

[FrankLing]

i use socket such as :
self.socket.setblocking(1)
self.socket.settimeout(1)
but this socket is no-block ,i find socketmodule.c sock_settimeout

s->sock_timeout = timeout;
internal_setblocking(s, timeout < 0.0);

if timeout >0, so internal_setblocking(s,false=0),so socket is no-block

by the way:
in sock_settimeout,call internal_setblocking params have error?

init_sockobject:
if (defaulttimeout >= 0.0)
internal_setblocking(s, 0);

[pitrou]

Yes, this is normal. Timeout sockets use a non-blocking fd internally:
http://docs.python.org/dev/library/socket.html#notes-on-socket-timeouts

This won't be visible to you if you only use the socket object, but it will if you call fileno() and use the file descriptor directly.

[FrankLing]

how to create socket and have block timeout mode?

        self.socket.setblocking(1)
        self.socket.settimeout(1)
this program is error?

[pitrou]

Frank, this bug tracker is not for posting general programming questions.
Please see http://mail.python.org/mailman/listinfo/python-list instead.