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<H2>
<BR>
11.11.1 Telnet Objects
</H2>
<P>
<tt class="class">Telnet</tt> instances have the following methods:
<P>
<dl><dt><b><a name='l2h-2183'><tt class='method'>read_until</tt></a></b> (<var>expected</var><big>[</big><var>, timeout</var><big>]</big>)
<dd>
Read until a given string is encountered or until timeout.
<P>
When no match is found, return whatever is available instead,
possibly the empty string. Raise <tt class="exception">EOFError</tt> if the connection
is closed and no cooked data is available.
</dl>
<P>
<dl><dt><b><a name='l2h-2184'><tt class='method'>read_all</tt></a></b> ()
<dd>
Read all data until EOF; block until connection closed.
</dl>
<P>
<dl><dt><b><a name='l2h-2185'><tt class='method'>read_some</tt></a></b> ()
<dd>
Read at least one byte of cooked data unless EOF is hit.
Return <code>''</code> if EOF is hit. Block if no data is immediately
available.
</dl>
<P>
<dl><dt><b><a name='l2h-2186'><tt class='method'>read_very_eager</tt></a></b> ()
<dd>
Read everything that can be without blocking in I/O (eager).
<P>
Raise <tt class="exception">EOFError</tt> if connection closed and no cooked data
available. Return <code>''</code> if no cooked data available otherwise.
Do not block unless in the midst of an IAC sequence.
</dl>
<P>
<dl><dt><b><a name='l2h-2187'><tt class='method'>read_eager</tt></a></b> ()
<dd>
Read readily available data.
<P>
Raise <tt class="exception">EOFError</tt> if connection closed and no cooked data
available. Return <code>''</code> if no cooked data available otherwise.
Do not block unless in the midst of an IAC sequence.
</dl>
<P>
<dl><dt><b><a name='l2h-2188'><tt class='method'>read_lazy</tt></a></b> ()
<dd>
Process and return data already in the queues (lazy).
<P>
Raise <tt class="exception">EOFError</tt> if connection closed and no data available.
Return <code>''</code> if no cooked data available otherwise. Do not block
unless in the midst of an IAC sequence.
</dl>
<P>
<dl><dt><b><a name='l2h-2189'><tt class='method'>read_very_lazy</tt></a></b> ()
<dd>
Return any data available in the cooked queue (very lazy).
<P>
Raise <tt class="exception">EOFError</tt> if connection closed and no data available.
Return <code>''</code> if no cooked data available otherwise. This method
never blocks.
</dl>
<P>
<dl><dt><b><a name='l2h-2190'><tt class='method'>open</tt></a></b> (<var>host</var><big>[</big><var>, port</var><big>]</big>)
<dd>
Connect to a host.
The optional second argument is the port number, which
defaults to the standard telnet port (23).
<P>
Do not try to reopen an already connected instance.
</dl>
<P>
<dl><dt><b><a name='l2h-2191'><tt class='method'>msg</tt></a></b> (<var>msg</var><big>[</big><var>, *args</var><big>]</big>)
<dd>
Print a debug message when the debug level is <code>></code> 0.
If extra arguments are present, they are substituted in the
message using the standard string formatting operator.
</dl>
<P>
<dl><dt><b><a name='l2h-2192'><tt class='method'>set_debuglevel</tt></a></b> (<var>debuglevel</var>)
<dd>
Set the debug level. The higher the value of <var>debuglevel</var>, the
more debug output you get (on <code>sys.stdout</code>).
</dl>
<P>
<dl><dt><b><a name='l2h-2193'><tt class='method'>close</tt></a></b> ()
<dd>
Close the connection.
</dl>
<P>
<dl><dt><b><a name='l2h-2194'><tt class='method'>get_socket</tt></a></b> ()
<dd>
Return the socket object used internally.
</dl>
<P>
<dl><dt><b><a name='l2h-2195'><tt class='method'>fileno</tt></a></b> ()
<dd>
Return the file descriptor of the socket object used internally.
</dl>
<P>
<dl><dt><b><a name='l2h-2196'><tt class='method'>write</tt></a></b> (<var>buffer</var>)
<dd>
Write a string to the socket, doubling any IAC characters.
This can block if the connection is blocked. May raise
<tt class="exception">socket.error</tt> if the connection is closed.
</dl>
<P>
<dl><dt><b><a name='l2h-2197'><tt class='method'>interact</tt></a></b> ()
<dd>
Interaction function, emulates a very dumb telnet client.
</dl>
<P>
<dl><dt><b><a name='l2h-2198'><tt class='method'>mt_interact</tt></a></b> ()
<dd>
Multithreaded version of <tt class="method">interact()</tt>.
</dl>
<P>
<dl><dt><b><a name='l2h-2199'><tt class='method'>expect</tt></a></b> (<var>list</var><big>[</big><var>, timeout</var><big>]</big>)
<dd>
Read until one from a list of a regular expressions matches.
<P>
The first argument is a list of regular expressions, either
compiled (<tt class="class">re.RegexObject</tt> instances) or uncompiled (strings).
The optional second argument is a timeout, in seconds; the default
is to block indefinitely.
<P>
Return a tuple of three items: the index in the list of the
first regular expression that matches; the match object
returned; and the text read up till and including the match.
<P>
If end of file is found and no text was read, raise
<tt class="exception">EOFError</tt>. Otherwise, when nothing matches, return
<code>(-1, None, <var>text</var>)</code> where <var>text</var> is the text received so
far (may be the empty string if a timeout happened).
<P>
If a regular expression ends with a greedy match (e.g. <tt class="regexp">.*</tt>)
or if more than one expression can match the same input, the
results are indeterministic, and may depend on the I/O timing.
</dl>
<P>
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