11.10.1 Telnet Objects

Telnet instances have the following methods:

read_until (expected[, timeout])
Read until a given string is encountered or until timeout.

When no match is found, return whatever is available instead, possibly the empty string. Raise EOFError if the connection is closed and no cooked data is available.

read_all ()
Read all data until EOF; block until connection closed.

read_some ()
Read at least one byte of cooked data unless EOF is hit.

Return '' if EOF is hit. Block if no data is immediately available.

read_very_eager ()
Read everything that's possible without blocking in I/O (eager).

Raise EOFError if connection closed and no cooked data available. Return '' if no cooked data available otherwise. Don't block unless in the midst of an IAC sequence.

read_eager ()
Read readily available data.

Raise EOFError if connection closed and no cooked data available. Return '' if no cooked data available otherwise. Don't block unless in the midst of an IAC sequence.

read_lazy ()
Process and return data that's already in the queues (lazy).

Raise EOFError if connection closed and no data available. Return '' if no cooked data available otherwise. Don't block unless in the midst of an IAC sequence.

read_very_lazy ()
Return any data available in the cooked queue (very lazy).

Raise EOFError if connection closed and no data available. Return '' if no cooked data available otherwise. Don't block.

open (host[, port=0])
Connect to a host.

The optional second argument is the port number, which defaults to the standard telnet port (23).

Don't try to reopen an already connected instance.

msg (msg[, *args])
Print a debug message, when the debug level is > 0.

If extra arguments are present, they are substituted in the message using the standard string formatting operator.

set_debuglevel (debuglevel)
Set the debug level.

The higher it is, the more debug output you get (on sys.stdout).

close ()
Close the connection.

get_socket ()
Return the socket object used internally.

fileno ()
Return the fileno() of the socket object used internally.

write (buffer)
Write a string to the socket, doubling any IAC characters.

Can block if the connection is blocked. May raise socket.error if the connection is closed.

interact ()
Interaction function, emulates a very dumb telnet client.

mt_interact ()
Multithreaded version of interact.

expect (list, timeout=None)
Read until one from a list of a regular expressions matches.

The first argument is a list of regular expressions, either compiled (re.RegexObject instances) or uncompiled (strings). The optional second argument is a timeout, in seconds; default is no timeout.

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.

If end of file is found and no text was read, raise EOFError. Otherwise, when nothing matches, return (-1, None, text) where text is the text received so far (may be the empty string if a timeout happened).

If a regular expression ends with a greedy match (e.g. .*) or if more than one expression can match the same input, the results are undeterministic, and may depend on the I/O timing.


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