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2to3.html
63.71
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__builtin__.html
11.79
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__future__.html
15.58
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__main__.html
8.33
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_winreg.html
73.99
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abc.html
26.82
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aepack.html
15.47
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aetools.html
18.79
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aetypes.html
27.08
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aifc.html
29.59
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al.html
22.13
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allos.html
35.48
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anydbm.html
19.31
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archiving.html
10.64
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argparse.html
269.59
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array.html
35.35
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ast.html
42.42
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asynchat.html
35.84
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asyncore.html
43.22
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atexit.html
19.23
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audioop.html
41.32
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autogil.html
9.77
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base64.html
24.8
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basehttpserver.html
40.6
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bastion.html
13.02
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bdb.html
50.06
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binascii.html
26.64
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binhex.html
12.66
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bisect.html
28.52
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bsddb.html
32.02
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bz2.html
31.92
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calendar.html
50.16
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carbon.html
54.14
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cd.html
35.24
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cgi.html
58.4
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cgihttpserver.html
15.12
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cgitb.html
13.5
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chunk.html
17.41
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cmath.html
32.41
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cmd.html
32.69
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code.html
28.92
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codecs.html
125.92
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codeop.html
16.42
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collections.html
150.36
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colorpicker.html
9.02
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colorsys.html
14.38
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commands.html
16.63
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compileall.html
21.18
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compiler.html
78.14
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configparser.html
73.92
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constants.html
14.68
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contextlib.html
22.91
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cookie.html
45.38
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cookielib.html
102.78
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copy.html
14.21
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copy_reg.html
15.82
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crypt.html
11.62
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crypto.html
8.35
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csv.html
82.79
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ctypes.html
280.57
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curses.ascii.html
28.97
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curses.html
200.94
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curses.panel.html
18.43
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custominterp.html
8.59
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datatypes.html
18.84
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datetime.html
261.02
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dbhash.html
18.4
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dbm.html
14.75
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debug.html
11.28
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decimal.html
239.14
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development.html
15.27
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difflib.html
96.93
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dircache.html
13.66
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dis.html
96.52
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distribution.html
8.27
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distutils.html
10.97
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dl.html
19.27
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doctest.html
193.18
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docxmlrpcserver.html
20.02
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dumbdbm.html
16.74
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dummy_thread.html
11.04
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dummy_threading.html
9.96
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easydialogs.html
38.83
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email-examples.html
47.2
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email.charset.html
32.45
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email.encoders.html
14.09
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email.errors.html
19.2
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email.generator.html
24.78
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email.header.html
31.12
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email.html
55.3
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email.iterators.html
14.22
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email.message.html
74.91
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email.mime.html
34.51
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email.parser.html
37.09
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email.utils.html
30.04
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ensurepip.html
20.21
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errno.html
52.31
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exceptions.html
73.4
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fcntl.html
27.85
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filecmp.html
26.49
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fileformats.html
10.21
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fileinput.html
29.36
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filesys.html
11.55
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fl.html
71.58
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fm.html
15
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fnmatch.html
17.78
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formatter.html
43.91
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fpectl.html
17.84
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fpformat.html
12.65
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fractions.html
27.17
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framework.html
44.24
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frameworks.html
8.11
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ftplib.html
56.56
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functions.html
216.84
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functools.html
31.06
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future_builtins.html
15.9
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gc.html
30.74
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gdbm.html
19.35
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gensuitemodule.html
14.54
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getopt.html
26.56
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getpass.html
12.5
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gettext.html
91.32
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gl.html
26.71
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glob.html
15.42
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grp.html
12.33
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gzip.html
21.95
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hashlib.html
27.4
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heapq.html
36.72
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hmac.html
15.97
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hotshot.html
22.69
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htmllib.html
29.9
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htmlparser.html
45.11
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httplib.html
78.55
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i18n.html
10.61
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ic.html
22.03
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idle.html
45.74
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imageop.html
20.94
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imaplib.html
69.9
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imgfile.html
14.91
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imghdr.html
13.43
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imp.html
41.48
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importlib.html
10.27
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imputil.html
36.11
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index.html
82.54
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inspect.html
64.31
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internet.html
26.77
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intro.html
9.76
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io.html
122.3
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ipc.html
17.18
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itertools.html
129.91
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jpeg.html
15.36
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json.html
79.09
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keyword.html
9.27
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language.html
12.35
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linecache.html
12.7
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locale.html
68.54
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logging.config.html
82.23
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logging.handlers.html
91.96
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logging.html
123.15
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mac.html
24.49
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macos.html
18.51
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macosa.html
14.55
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macostools.html
19.67
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macpath.html
9.19
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mailbox.html
185.53
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mailcap.html
15.3
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markup.html
20.37
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marshal.html
19.88
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math.html
50.52
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md5.html
16.65
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mhlib.html
30.04
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mimetools.html
23.84
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mimetypes.html
35.82
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mimewriter.html
18.19
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mimify.html
16.96
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miniaeframe.html
14.5
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misc.html
7.77
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mm.html
10.19
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mmap.html
33.52
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modulefinder.html
19.85
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modules.html
9.68
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msilib.html
72.78
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msvcrt.html
24.1
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multifile.html
28.82
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multiprocessing.html
423.97
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mutex.html
13.56
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netdata.html
19.28
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netrc.html
15.51
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new.html
16.1
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nis.html
13.19
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nntplib.html
51.08
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numbers.html
40.91
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numeric.html
14.85
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operator.html
118.32
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optparse.html
251.08
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os.html
270.49
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os.path.html
48.87
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ossaudiodev.html
49.79
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othergui.html
9.98
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parser.html
44.52
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pdb.html
41.44
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persistence.html
16.25
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pickle.html
107.94
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pickletools.html
13.21
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pipes.html
21.85
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pkgutil.html
30.59
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platform.html
40.14
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plistlib.html
20.96
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popen2.html
30.13
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poplib.html
27.93
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posix.html
17.27
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posixfile.html
23.68
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pprint.html
36.42
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profile.html
76.65
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pty.html
11.42
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pwd.html
13.53
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py_compile.html
13.33
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pyclbr.html
18.14
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pydoc.html
14.33
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pyexpat.html
93.28
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python.html
13.53
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queue.html
29.64
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quopri.html
14.5
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random.html
47.78
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re.html
163.11
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readline.html
41.2
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repr.html
24.57
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resource.html
30.86
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restricted.html
12.69
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rexec.html
43.59
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rfc822.html
51.25
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rlcompleter.html
15.29
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robotparser.html
15.01
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runpy.html
23.55
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sched.html
21.76
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scrolledtext.html
10.67
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select.html
50.17
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sets.html
39.92
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sgi.html
11.09
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sgmllib.html
38.77
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sha.html
14.55
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shelve.html
32.93
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shlex.html
38.43
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shutil.html
49.49
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signal.html
36.52
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simplehttpserver.html
21.57
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simplexmlrpcserver.html
40.41
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site.html
29
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smtpd.html
15.64
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smtplib.html
51.86
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sndhdr.html
12.05
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socket.html
126.94
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socketserver.html
81.38
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someos.html
17.09
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spwd.html
12.25
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sqlite3.html
154.12
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ssl.html
214.5
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stat.html
41.11
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statvfs.html
13.24
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stdtypes.html
309.83
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string.html
129.58
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stringio.html
21.1
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stringprep.html
21.4
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strings.html
16.42
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struct.html
47.68
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subprocess.html
117
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sun.html
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sunau.html
35.43
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sunaudio.html
21.05
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symbol.html
9.06
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symtable.html
29.03
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sys.html
118.12
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sysconfig.html
28.8
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syslog.html
21.29
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tabnanny.html
12.78
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tarfile.html
99.54
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telnetlib.html
30.46
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tempfile.html
35.02
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termios.html
19.22
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test.html
61.42
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textwrap.html
32.28
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thread.html
22.67
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threading.html
92.04
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time.html
65.55
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timeit.html
44.38
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tix.html
56.73
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tk.html
26.76
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tkinter.html
86.67
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token.html
27.31
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tokenize.html
21.69
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trace.html
33.91
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traceback.html
44.22
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ttk.html
123.83
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tty.html
10.95
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turtle.html
246.17
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types.html
33.66
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undoc.html
25.54
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unicodedata.html
22.64
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unittest.html
246.75
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unix.html
11.9
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urllib.html
71.61
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urllib2.html
128.77
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urlparse.html
49.04
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user.html
13.41
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userdict.html
32.96
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uu.html
13.25
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uuid.html
33.55
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warnings.html
51.86
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wave.html
29.08
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weakref.html
41.14
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webbrowser.html
29.53
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whichdb.html
10.44
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windows.html
10.37
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winsound.html
22.56
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wsgiref.html
94.38
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xdrlib.html
38.05
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xml.dom.html
110.39
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xml.dom.minidom.html
45.23
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xml.dom.pulldom.html
16.32
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xml.etree.elementtree.html
124.2
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xml.html
18.76
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xml.sax.handler.html
47.5
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xml.sax.html
26.04
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xml.sax.reader.html
51.4
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xml.sax.utils.html
18.11
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xmlrpclib.html
71.79
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zipfile.html
67.26
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zipimport.html
24.32
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zlib.html
34.41
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<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" /> <title>20.14. telnetlib — Telnet client — Python 2.7.18 documentation</title> <link rel="stylesheet" type="text/css" href="../_static/pygments.css" /> <link rel="stylesheet" type="text/css" href="../_static/classic.css" /> <script data-url_root="../" id="documentation_options" src="../_static/documentation_options.js"></script> <script src="../_static/jquery.js"></script> <script src="../_static/underscore.js"></script> <script src="../_static/doctools.js"></script> <script src="../_static/sidebar.js"></script> <link rel="search" type="application/opensearchdescription+xml" title="Search within Python 2.7.18 documentation" href="../_static/opensearch.xml"/> <link rel="author" title="About these documents" href="../about.html" /> <link rel="index" title="Index" href="../genindex.html" /> <link rel="search" title="Search" href="../search.html" /> <link rel="copyright" title="Copyright" href="../copyright.html" /> <link rel="next" title="20.15. uuid — UUID objects according to RFC 4122" href="uuid.html" /> <link rel="prev" title="20.13. smtpd — SMTP Server" href="smtpd.html" /> <link rel="shortcut icon" type="image/png" href="../_static/py.png" /> <link rel="canonical" href="file:///usr/share/doc/python2.7/html/library/telnetlib.html" /> <script type="text/javascript" src="../_static/copybutton.js"></script> </head><body> <div id="outdated-warning" style="padding: .5em; text-align: center; background-color: #FFBABA; color: #6A0E0E;"> This document is for an old version of Python that is <a href="https://devguide.python.org/devcycle/#end-of-life-branches">no longer supported</a>. You should install the python3 and python3-doc packages and read the <a href="file:///usr/share/doc/python3-doc/html/library/telnetlib.html"> Python documentation for the Python3 version packaged in this release</a>. </div> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="uuid.html" title="20.15. uuid — UUID objects according to RFC 4122" accesskey="N">next</a> |</li> <li class="right" > <a href="smtpd.html" title="20.13. smtpd — SMTP Server" accesskey="P">previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> »</li> <li> <a href="../index.html">Python 2.7.18 documentation</a> » </li> <li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li> <li class="nav-item nav-item-2"><a href="internet.html" accesskey="U"><span class="section-number">20. </span>Internet Protocols and Support</a> »</li> <li class="nav-item nav-item-this"><a href=""><span class="section-number">20.14. </span><code class="xref py py-mod docutils literal notranslate"><span class="pre">telnetlib</span></code> — Telnet client</a></li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body" role="main"> <section id="module-telnetlib"> <span id="telnetlib-telnet-client"></span><h1><span class="section-number">20.14. </span><a class="reference internal" href="#module-telnetlib" title="telnetlib: Telnet client class."><code class="xref py py-mod docutils literal notranslate"><span class="pre">telnetlib</span></code></a> — Telnet client<a class="headerlink" href="#module-telnetlib" title="Permalink to this headline">¶</a></h1> <p id="index-0"><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/2.7/Lib/telnetlib.py">Lib/telnetlib.py</a></p> <hr class="docutils" /> <p>The <a class="reference internal" href="#module-telnetlib" title="telnetlib: Telnet client class."><code class="xref py py-mod docutils literal notranslate"><span class="pre">telnetlib</span></code></a> module provides a <a class="reference internal" href="#telnetlib.Telnet" title="telnetlib.Telnet"><code class="xref py py-class docutils literal notranslate"><span class="pre">Telnet</span></code></a> class that implements the Telnet protocol. See <span class="target" id="index-1"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc854.html"><strong>RFC 854</strong></a> for details about the protocol. In addition, it provides symbolic constants for the protocol characters (see below), and for the telnet options. The symbolic names of the telnet options follow the definitions in <code class="docutils literal notranslate"><span class="pre">arpa/telnet.h</span></code>, with the leading <code class="docutils literal notranslate"><span class="pre">TELOPT_</span></code> removed. For symbolic names of options which are traditionally not included in <code class="docutils literal notranslate"><span class="pre">arpa/telnet.h</span></code>, see the module source itself.</p> <p>The symbolic constants for the telnet commands are: IAC, DONT, DO, WONT, WILL, SE (Subnegotiation End), NOP (No Operation), DM (Data Mark), BRK (Break), IP (Interrupt process), AO (Abort output), AYT (Are You There), EC (Erase Character), EL (Erase Line), GA (Go Ahead), SB (Subnegotiation Begin).</p> <dl class="py class"> <dt class="sig sig-object py" id="telnetlib.Telnet"> <em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">telnetlib.</span></span><span class="sig-name descname"><span class="pre">Telnet</span></span><span class="sig-paren">(</span><span class="optional">[</span><em class="sig-param"><span class="n"><span class="pre">host</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">port</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">timeout</span></span></em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet" title="Permalink to this definition">¶</a></dt> <dd><p><a class="reference internal" href="#telnetlib.Telnet" title="telnetlib.Telnet"><code class="xref py py-class docutils literal notranslate"><span class="pre">Telnet</span></code></a> represents a connection to a Telnet server. The instance is initially not connected by default; the <a class="reference internal" href="#telnetlib.Telnet.open" title="telnetlib.Telnet.open"><code class="xref py py-meth docutils literal notranslate"><span class="pre">open()</span></code></a> method must be used to establish a connection. Alternatively, the host name and optional port number can be passed to the constructor, to, in which case the connection to the server will be established before the constructor returns. The optional <em>timeout</em> parameter specifies a timeout in seconds for blocking operations like the connection attempt (if not specified, the global default timeout setting will be used).</p> <p>Do not reopen an already connected instance.</p> <p>This class has many <code class="xref py py-meth docutils literal notranslate"><span class="pre">read_*()</span></code> methods. Note that some of them raise <code class="xref py py-exc docutils literal notranslate"><span class="pre">EOFError</span></code> when the end of the connection is read, because they can return an empty string for other reasons. See the individual descriptions below.</p> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 2.6: </span><em>timeout</em> was added.</p> </div> </dd></dl> <div class="admonition seealso"> <p class="admonition-title">See also</p> <dl class="simple"> <dt><span class="target" id="index-2"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc854.html"><strong>RFC 854</strong></a> - Telnet Protocol Specification</dt><dd><p>Definition of the Telnet protocol.</p> </dd> </dl> </div> <section id="telnet-objects"> <span id="id1"></span><h2><span class="section-number">20.14.1. </span>Telnet Objects<a class="headerlink" href="#telnet-objects" title="Permalink to this headline">¶</a></h2> <p><a class="reference internal" href="#telnetlib.Telnet" title="telnetlib.Telnet"><code class="xref py py-class docutils literal notranslate"><span class="pre">Telnet</span></code></a> instances have the following methods:</p> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.read_until"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">read_until</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">expected</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">timeout</span></span></em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.read_until" title="Permalink to this definition">¶</a></dt> <dd><p>Read until a given string, <em>expected</em>, is encountered or until <em>timeout</em> seconds have passed.</p> <p>When no match is found, return whatever is available instead, possibly the empty string. Raise <code class="xref py py-exc docutils literal notranslate"><span class="pre">EOFError</span></code> if the connection is closed and no cooked data is available.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.read_all"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">read_all</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.read_all" title="Permalink to this definition">¶</a></dt> <dd><p>Read all data until EOF; block until connection closed.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.read_some"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">read_some</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.read_some" title="Permalink to this definition">¶</a></dt> <dd><p>Read at least one byte of cooked data unless EOF is hit. Return <code class="docutils literal notranslate"><span class="pre">''</span></code> if EOF is hit. Block if no data is immediately available.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.read_very_eager"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">read_very_eager</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.read_very_eager" title="Permalink to this definition">¶</a></dt> <dd><p>Read everything that can be without blocking in I/O (eager).</p> <p>Raise <code class="xref py py-exc docutils literal notranslate"><span class="pre">EOFError</span></code> if connection closed and no cooked data available. Return <code class="docutils literal notranslate"><span class="pre">''</span></code> if no cooked data available otherwise. Do not block unless in the midst of an IAC sequence.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.read_eager"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">read_eager</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.read_eager" title="Permalink to this definition">¶</a></dt> <dd><p>Read readily available data.</p> <p>Raise <code class="xref py py-exc docutils literal notranslate"><span class="pre">EOFError</span></code> if connection closed and no cooked data available. Return <code class="docutils literal notranslate"><span class="pre">''</span></code> if no cooked data available otherwise. Do not block unless in the midst of an IAC sequence.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.read_lazy"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">read_lazy</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.read_lazy" title="Permalink to this definition">¶</a></dt> <dd><p>Process and return data already in the queues (lazy).</p> <p>Raise <code class="xref py py-exc docutils literal notranslate"><span class="pre">EOFError</span></code> if connection closed and no data available. Return <code class="docutils literal notranslate"><span class="pre">''</span></code> if no cooked data available otherwise. Do not block unless in the midst of an IAC sequence.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.read_very_lazy"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">read_very_lazy</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.read_very_lazy" title="Permalink to this definition">¶</a></dt> <dd><p>Return any data available in the cooked queue (very lazy).</p> <p>Raise <code class="xref py py-exc docutils literal notranslate"><span class="pre">EOFError</span></code> if connection closed and no data available. Return <code class="docutils literal notranslate"><span class="pre">''</span></code> if no cooked data available otherwise. This method never blocks.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.read_sb_data"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">read_sb_data</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.read_sb_data" title="Permalink to this definition">¶</a></dt> <dd><p>Return the data collected between a SB/SE pair (suboption begin/end). The callback should access these data when it was invoked with a <code class="docutils literal notranslate"><span class="pre">SE</span></code> command. This method never blocks.</p> <div class="versionadded"> <p><span class="versionmodified added">New in version 2.3.</span></p> </div> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.open"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">open</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">host</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">port</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">timeout</span></span></em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.open" title="Permalink to this definition">¶</a></dt> <dd><p>Connect to a host. The optional second argument is the port number, which defaults to the standard Telnet port (23). The optional <em>timeout</em> parameter specifies a timeout in seconds for blocking operations like the connection attempt (if not specified, the global default timeout setting will be used).</p> <p>Do not try to reopen an already connected instance.</p> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 2.6: </span><em>timeout</em> was added.</p> </div> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.msg"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">msg</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">msg</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">*args</span></span></em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.msg" title="Permalink to this definition">¶</a></dt> <dd><p>Print a debug message when the debug level is <code class="docutils literal notranslate"><span class="pre">></span></code> 0. If extra arguments are present, they are substituted in the message using the standard string formatting operator.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.set_debuglevel"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">set_debuglevel</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">debuglevel</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.set_debuglevel" title="Permalink to this definition">¶</a></dt> <dd><p>Set the debug level. The higher the value of <em>debuglevel</em>, the more debug output you get (on <code class="docutils literal notranslate"><span class="pre">sys.stdout</span></code>).</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.close"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">close</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.close" title="Permalink to this definition">¶</a></dt> <dd><p>Close the connection.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.get_socket"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">get_socket</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.get_socket" title="Permalink to this definition">¶</a></dt> <dd><p>Return the socket object used internally.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.fileno"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">fileno</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.fileno" title="Permalink to this definition">¶</a></dt> <dd><p>Return the file descriptor of the socket object used internally.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.write"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">write</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">buffer</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.write" title="Permalink to this definition">¶</a></dt> <dd><p>Write a string to the socket, doubling any IAC characters. This can block if the connection is blocked. May raise <a class="reference internal" href="socket.html#socket.error" title="socket.error"><code class="xref py py-exc docutils literal notranslate"><span class="pre">socket.error</span></code></a> if the connection is closed.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.interact"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">interact</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.interact" title="Permalink to this definition">¶</a></dt> <dd><p>Interaction function, emulates a very dumb Telnet client.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.mt_interact"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">mt_interact</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.mt_interact" title="Permalink to this definition">¶</a></dt> <dd><p>Multithreaded version of <a class="reference internal" href="#telnetlib.Telnet.interact" title="telnetlib.Telnet.interact"><code class="xref py py-meth docutils literal notranslate"><span class="pre">interact()</span></code></a>.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.expect"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">expect</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">list</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">timeout</span></span></em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.expect" title="Permalink to this definition">¶</a></dt> <dd><p>Read until one from a list of a regular expressions matches.</p> <p>The first argument is a list of regular expressions, either compiled (<code class="xref py py-class docutils literal notranslate"><span class="pre">regex</span> <span class="pre">objects</span></code>) or uncompiled (strings). The optional second argument is a timeout, in seconds; the default is to block indefinitely.</p> <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> <p>If end of file is found and no text was read, raise <code class="xref py py-exc docutils literal notranslate"><span class="pre">EOFError</span></code>. Otherwise, when nothing matches, return <code class="docutils literal notranslate"><span class="pre">(-1,</span> <span class="pre">None,</span> <span class="pre">text)</span></code> where <em>text</em> is the text received so far (may be the empty string if a timeout happened).</p> <p>If a regular expression ends with a greedy match (such as <code class="docutils literal notranslate"><span class="pre">.*</span></code>) or if more than one expression can match the same input, the results are non-deterministic, and may depend on the I/O timing.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py" id="telnetlib.Telnet.set_option_negotiation_callback"> <span class="sig-prename descclassname"><span class="pre">Telnet.</span></span><span class="sig-name descname"><span class="pre">set_option_negotiation_callback</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">callback</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#telnetlib.Telnet.set_option_negotiation_callback" title="Permalink to this definition">¶</a></dt> <dd><p>Each time a telnet option is read on the input flow, this <em>callback</em> (if set) is called with the following parameters: callback(telnet socket, command (DO/DONT/WILL/WONT), option). No other action is done afterwards by telnetlib.</p> </dd></dl> </section> <section id="telnet-example"> <span id="id2"></span><h2><span class="section-number">20.14.2. </span>Telnet Example<a class="headerlink" href="#telnet-example" title="Permalink to this headline">¶</a></h2> <p>A simple example illustrating typical use:</p> <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">getpass</span> <span class="kn">import</span> <span class="nn">sys</span> <span class="kn">import</span> <span class="nn">telnetlib</span> <span class="n">HOST</span> <span class="o">=</span> <span class="s2">"localhost"</span> <span class="n">user</span> <span class="o">=</span> <span class="n">raw_input</span><span class="p">(</span><span class="s2">"Enter your remote account: "</span><span class="p">)</span> <span class="n">password</span> <span class="o">=</span> <span class="n">getpass</span><span class="o">.</span><span class="n">getpass</span><span class="p">()</span> <span class="n">tn</span> <span class="o">=</span> <span class="n">telnetlib</span><span class="o">.</span><span class="n">Telnet</span><span class="p">(</span><span class="n">HOST</span><span class="p">)</span> <span class="n">tn</span><span class="o">.</span><span class="n">read_until</span><span class="p">(</span><span class="s2">"login: "</span><span class="p">)</span> <span class="n">tn</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">user</span> <span class="o">+</span> <span class="s2">"</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span> <span class="k">if</span> <span class="n">password</span><span class="p">:</span> <span class="n">tn</span><span class="o">.</span><span class="n">read_until</span><span class="p">(</span><span class="s2">"Password: "</span><span class="p">)</span> <span class="n">tn</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">password</span> <span class="o">+</span> <span class="s2">"</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span> <span class="n">tn</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="s2">"ls</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span> <span class="n">tn</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="s2">"exit</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span> <span class="nb">print</span> <span class="n">tn</span><span class="o">.</span><span class="n">read_all</span><span class="p">()</span> </pre></div> </div> </section> </section> <div class="clearer"></div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h3><a href="../contents.html">Table of Contents</a></h3> <ul> <li><a class="reference internal" href="#">20.14. <code class="xref py py-mod docutils literal notranslate"><span class="pre">telnetlib</span></code> — Telnet client</a><ul> <li><a class="reference internal" href="#telnet-objects">20.14.1. 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