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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
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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
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tarfile.html
99.54
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telnetlib.html
30.46
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tempfile.html
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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
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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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You should install the python3 and python3-doc packages and read the <a href="file:///usr/share/doc/python3-doc/html/library/cd.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="fl.html" title="39.4. fl — FORMS library for graphical user interfaces" accesskey="N">next</a> |</li> <li class="right" > <a href="al.html" title="39.1. al — Audio functions on the SGI" 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="sgi.html" accesskey="U"><span class="section-number">39. </span>SGI IRIX Specific Services</a> »</li> <li class="nav-item nav-item-this"><a href=""><span class="section-number">39.3. </span><code class="xref py py-mod docutils literal notranslate"><span class="pre">cd</span></code> — CD-ROM access on SGI systems</a></li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body" role="main"> <section id="module-cd"> <span id="cd-cd-rom-access-on-sgi-systems"></span><h1><span class="section-number">39.3. </span><a class="reference internal" href="#module-cd" title="cd: Interface to the CD-ROM on Silicon Graphics systems. (deprecated) (IRIX)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">cd</span></code></a> — CD-ROM access on SGI systems<a class="headerlink" href="#module-cd" title="Permalink to this headline">¶</a></h1> <div class="deprecated"> <p><span class="versionmodified deprecated">Deprecated since version 2.6: </span>The <a class="reference internal" href="#module-cd" title="cd: Interface to the CD-ROM on Silicon Graphics systems. (deprecated) (IRIX)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">cd</span></code></a> module has been removed in Python 3.</p> </div> <p>This module provides an interface to the Silicon Graphics CD library. It is available only on Silicon Graphics systems.</p> <p>The way the library works is as follows. A program opens the CD-ROM device with <a class="reference internal" href="#cd.open" title="cd.open"><code class="xref py py-func docutils literal notranslate"><span class="pre">open()</span></code></a> and creates a parser to parse the data from the CD with <a class="reference internal" href="#cd.createparser" title="cd.createparser"><code class="xref py py-func docutils literal notranslate"><span class="pre">createparser()</span></code></a>. The object returned by <a class="reference internal" href="#cd.open" title="cd.open"><code class="xref py py-func docutils literal notranslate"><span class="pre">open()</span></code></a> can be used to read data from the CD, but also to get status information for the CD-ROM device, and to get information about the CD, such as the table of contents. Data from the CD is passed to the parser, which parses the frames, and calls any callback functions that have previously been added.</p> <p>An audio CD is divided into <em class="dfn">tracks</em> or <em class="dfn">programs</em> (the terms are used interchangeably). Tracks can be subdivided into <em class="dfn">indices</em>. An audio CD contains a <em class="dfn">table of contents</em> which gives the starts of the tracks on the CD. Index 0 is usually the pause before the start of a track. The start of the track as given by the table of contents is normally the start of index 1.</p> <p>Positions on a CD can be represented in two ways. Either a frame number or a tuple of three values, minutes, seconds and frames. Most functions use the latter representation. Positions can be both relative to the beginning of the CD, and to the beginning of the track.</p> <p>Module <a class="reference internal" href="#module-cd" title="cd: Interface to the CD-ROM on Silicon Graphics systems. (deprecated) (IRIX)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">cd</span></code></a> defines the following functions and constants:</p> <dl class="py function"> <dt class="sig sig-object py" id="cd.createparser"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">createparser</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#cd.createparser" title="Permalink to this definition">¶</a></dt> <dd><p>Create and return an opaque parser object. The methods of the parser object are described below.</p> </dd></dl> <dl class="py function"> <dt class="sig sig-object py" id="cd.msftoframe"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">msftoframe</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">minutes</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">seconds</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">frames</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#cd.msftoframe" title="Permalink to this definition">¶</a></dt> <dd><p>Converts a <code class="docutils literal notranslate"><span class="pre">(minutes,</span> <span class="pre">seconds,</span> <span class="pre">frames)</span></code> triple representing time in absolute time code into the corresponding CD frame number.</p> </dd></dl> <dl class="py function"> <dt class="sig sig-object py" id="cd.open"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">open</span></span><span class="sig-paren">(</span><span class="optional">[</span><em class="sig-param"><span class="n"><span class="pre">device</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">mode</span></span></em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#cd.open" title="Permalink to this definition">¶</a></dt> <dd><p>Open the CD-ROM device. The return value is an opaque player object; methods of the player object are described below. The device is the name of the SCSI device file, e.g. <code class="docutils literal notranslate"><span class="pre">'/dev/scsi/sc0d4l0'</span></code>, or <code class="docutils literal notranslate"><span class="pre">None</span></code>. If omitted or <code class="docutils literal notranslate"><span class="pre">None</span></code>, the hardware inventory is consulted to locate a CD-ROM drive. The <em>mode</em>, if not omitted, should be the string <code class="docutils literal notranslate"><span class="pre">'r'</span></code>.</p> </dd></dl> <p>The module defines the following variables:</p> <dl class="py exception"> <dt class="sig sig-object py" id="cd.error"> <em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">error</span></span><a class="headerlink" href="#cd.error" title="Permalink to this definition">¶</a></dt> <dd><p>Exception raised on various errors.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="cd.DATASIZE"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">DATASIZE</span></span><a class="headerlink" href="#cd.DATASIZE" title="Permalink to this definition">¶</a></dt> <dd><p>The size of one frame’s worth of audio data. This is the size of the audio data as passed to the callback of type <code class="docutils literal notranslate"><span class="pre">audio</span></code>.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="cd.BLOCKSIZE"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">BLOCKSIZE</span></span><a class="headerlink" href="#cd.BLOCKSIZE" title="Permalink to this definition">¶</a></dt> <dd><p>The size of one uninterpreted frame of audio data.</p> </dd></dl> <p>The following variables are states as returned by <code class="xref py py-func docutils literal notranslate"><span class="pre">getstatus()</span></code>:</p> <dl class="py data"> <dt class="sig sig-object py" id="cd.READY"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">READY</span></span><a class="headerlink" href="#cd.READY" title="Permalink to this definition">¶</a></dt> <dd><p>The drive is ready for operation loaded with an audio CD.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="cd.NODISC"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">NODISC</span></span><a class="headerlink" href="#cd.NODISC" title="Permalink to this definition">¶</a></dt> <dd><p>The drive does not have a CD loaded.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="cd.CDROM"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">CDROM</span></span><a class="headerlink" href="#cd.CDROM" title="Permalink to this definition">¶</a></dt> <dd><p>The drive is loaded with a CD-ROM. Subsequent play or read operations will return I/O errors.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="cd.ERROR"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">ERROR</span></span><a class="headerlink" href="#cd.ERROR" title="Permalink to this definition">¶</a></dt> <dd><p>An error occurred while trying to read the disc or its table of contents.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="cd.PLAYING"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">PLAYING</span></span><a class="headerlink" href="#cd.PLAYING" title="Permalink to this definition">¶</a></dt> <dd><p>The drive is in CD player mode playing an audio CD through its audio jacks.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="cd.PAUSED"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">PAUSED</span></span><a class="headerlink" href="#cd.PAUSED" title="Permalink to this definition">¶</a></dt> <dd><p>The drive is in CD layer mode with play paused.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="cd.STILL"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">STILL</span></span><a class="headerlink" href="#cd.STILL" title="Permalink to this definition">¶</a></dt> <dd><p>The equivalent of <a class="reference internal" href="#cd.PAUSED" title="cd.PAUSED"><code class="xref py py-const docutils literal notranslate"><span class="pre">PAUSED</span></code></a> on older (non 3301) model Toshiba CD-ROM drives. Such drives have never been shipped by SGI.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="cd.audio"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">audio</span></span><a class="headerlink" href="#cd.audio" title="Permalink to this definition">¶</a></dt> <dt class="sig sig-object py" id="cd.pnum"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">pnum</span></span><a class="headerlink" href="#cd.pnum" title="Permalink to this definition">¶</a></dt> <dt class="sig sig-object py" id="cd.index"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">index</span></span><a class="headerlink" href="#cd.index" title="Permalink to this definition">¶</a></dt> <dt class="sig sig-object py" id="cd.ptime"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">ptime</span></span><a class="headerlink" href="#cd.ptime" title="Permalink to this definition">¶</a></dt> <dt class="sig sig-object py" id="cd.atime"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">atime</span></span><a class="headerlink" href="#cd.atime" title="Permalink to this definition">¶</a></dt> <dt class="sig sig-object py" id="cd.catalog"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">catalog</span></span><a class="headerlink" href="#cd.catalog" title="Permalink to this definition">¶</a></dt> <dt class="sig sig-object py" id="cd.ident"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">ident</span></span><a class="headerlink" href="#cd.ident" title="Permalink to this definition">¶</a></dt> <dt class="sig sig-object py" id="cd.control"> <span class="sig-prename descclassname"><span class="pre">cd.</span></span><span class="sig-name descname"><span class="pre">control</span></span><a class="headerlink" href="#cd.control" title="Permalink to this definition">¶</a></dt> <dd><p>Integer constants describing the various types of parser callbacks that can be set by the <code class="xref py py-meth docutils literal notranslate"><span class="pre">addcallback()</span></code> method of CD parser objects (see below).</p> </dd></dl> <section id="player-objects"> <span id="id1"></span><h2><span class="section-number">39.3.1. </span>Player Objects<a class="headerlink" href="#player-objects" title="Permalink to this headline">¶</a></h2> <p>Player objects (returned by <a class="reference internal" href="#cd.open" title="cd.open"><code class="xref py py-func docutils literal notranslate"><span class="pre">open()</span></code></a>) have the following methods:</p> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.allowremoval()</span></span></dt> <dd><p>Unlocks the eject button on the CD-ROM drive permitting the user to eject the caddy if desired.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.bestreadsize()</span></span></dt> <dd><p>Returns the best value to use for the <em>num_frames</em> parameter of the <code class="xref py py-meth docutils literal notranslate"><span class="pre">readda()</span></code> method. Best is defined as the value that permits a continuous flow of data from the CD-ROM drive.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.close()</span></span></dt> <dd><p>Frees the resources associated with the player object. After calling <code class="xref py py-meth docutils literal notranslate"><span class="pre">close()</span></code>, the methods of the object should no longer be used.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.eject()</span></span></dt> <dd><p>Ejects the caddy from the CD-ROM drive.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.getstatus()</span></span></dt> <dd><p>Returns information pertaining to the current state of the CD-ROM drive. The returned information is a tuple with the following values: <em>state</em>, <em>track</em>, <em>rtime</em>, <em>atime</em>, <em>ttime</em>, <em>first</em>, <em>last</em>, <em>scsi_audio</em>, <em>cur_block</em>. <em>rtime</em> is the time relative to the start of the current track; <em>atime</em> is the time relative to the beginning of the disc; <em>ttime</em> is the total time on the disc. For more information on the meaning of the values, see the man page <em class="manpage">CDgetstatus(3dm)</em>. The value of <em>state</em> is one of the following: <a class="reference internal" href="#cd.ERROR" title="cd.ERROR"><code class="xref py py-const docutils literal notranslate"><span class="pre">ERROR</span></code></a>, <a class="reference internal" href="#cd.NODISC" title="cd.NODISC"><code class="xref py py-const docutils literal notranslate"><span class="pre">NODISC</span></code></a>, <a class="reference internal" href="#cd.READY" title="cd.READY"><code class="xref py py-const docutils literal notranslate"><span class="pre">READY</span></code></a>, <a class="reference internal" href="#cd.PLAYING" title="cd.PLAYING"><code class="xref py py-const docutils literal notranslate"><span class="pre">PLAYING</span></code></a>, <a class="reference internal" href="#cd.PAUSED" title="cd.PAUSED"><code class="xref py py-const docutils literal notranslate"><span class="pre">PAUSED</span></code></a>, <a class="reference internal" href="#cd.STILL" title="cd.STILL"><code class="xref py py-const docutils literal notranslate"><span class="pre">STILL</span></code></a>, or <a class="reference internal" href="#cd.CDROM" title="cd.CDROM"><code class="xref py py-const docutils literal notranslate"><span class="pre">CDROM</span></code></a>.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.gettrackinfo(track)</span></span></dt> <dd><p>Returns information about the specified track. The returned information is a tuple consisting of two elements, the start time of the track and the duration of the track.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.msftoblock(min,</span> <span class="pre">sec,</span> <span class="pre">frame)</span></span></dt> <dd><p>Converts a minutes, seconds, frames triple representing a time in absolute time code into the corresponding logical block number for the given CD-ROM drive. You should use <a class="reference internal" href="#cd.msftoframe" title="cd.msftoframe"><code class="xref py py-func docutils literal notranslate"><span class="pre">msftoframe()</span></code></a> rather than <code class="xref py py-meth docutils literal notranslate"><span class="pre">msftoblock()</span></code> for comparing times. The logical block number differs from the frame number by an offset required by certain CD-ROM drives.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.play(start,</span> <span class="pre">play)</span></span></dt> <dd><p>Starts playback of an audio CD in the CD-ROM drive at the specified track. The audio output appears on the CD-ROM drive’s headphone and audio jacks (if fitted). Play stops at the end of the disc. <em>start</em> is the number of the track at which to start playing the CD; if <em>play</em> is 0, the CD will be set to an initial paused state. The method <code class="xref py py-meth docutils literal notranslate"><span class="pre">togglepause()</span></code> can then be used to commence play.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.playabs(minutes,</span> <span class="pre">seconds,</span> <span class="pre">frames,</span> <span class="pre">play)</span></span></dt> <dd><p>Like <code class="xref py py-meth docutils literal notranslate"><span class="pre">play()</span></code>, except that the start is given in minutes, seconds, and frames instead of a track number.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.playtrack(start,</span> <span class="pre">play)</span></span></dt> <dd><p>Like <code class="xref py py-meth docutils literal notranslate"><span class="pre">play()</span></code>, except that playing stops at the end of the track.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.playtrackabs(track,</span> <span class="pre">minutes,</span> <span class="pre">seconds,</span> <span class="pre">frames,</span> <span class="pre">play)</span></span></dt> <dd><p>Like <code class="xref py py-meth docutils literal notranslate"><span class="pre">play()</span></code>, except that playing begins at the specified absolute time and ends at the end of the specified track.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.preventremoval()</span></span></dt> <dd><p>Locks the eject button on the CD-ROM drive thus preventing the user from arbitrarily ejecting the caddy.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.readda(num_frames)</span></span></dt> <dd><p>Reads the specified number of frames from an audio CD mounted in the CD-ROM drive. The return value is a string representing the audio frames. This string can be passed unaltered to the <code class="xref py py-meth docutils literal notranslate"><span class="pre">parseframe()</span></code> method of the parser object.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.seek(minutes,</span> <span class="pre">seconds,</span> <span class="pre">frames)</span></span></dt> <dd><p>Sets the pointer that indicates the starting point of the next read of digital audio data from a CD-ROM. The pointer is set to an absolute time code location specified in <em>minutes</em>, <em>seconds</em>, and <em>frames</em>. The return value is the logical block number to which the pointer has been set.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.seekblock(block)</span></span></dt> <dd><p>Sets the pointer that indicates the starting point of the next read of digital audio data from a CD-ROM. The pointer is set to the specified logical block number. The return value is the logical block number to which the pointer has been set.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.seektrack(track)</span></span></dt> <dd><p>Sets the pointer that indicates the starting point of the next read of digital audio data from a CD-ROM. The pointer is set to the specified track. The return value is the logical block number to which the pointer has been set.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.stop()</span></span></dt> <dd><p>Stops the current playing operation.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">player.togglepause()</span></span></dt> <dd><p>Pauses the CD if it is playing, and makes it play if it is paused.</p> </dd></dl> </section> <section id="parser-objects"> <span id="cd-parser-objects"></span><h2><span class="section-number">39.3.2. </span>Parser Objects<a class="headerlink" href="#parser-objects" title="Permalink to this headline">¶</a></h2> <p>Parser objects (returned by <a class="reference internal" href="#cd.createparser" title="cd.createparser"><code class="xref py py-func docutils literal notranslate"><span class="pre">createparser()</span></code></a>) have the following methods:</p> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">parser.addcallback(type,</span> <span class="pre">func,</span> <span class="pre">arg)</span></span></dt> <dd><p>Adds a callback for the parser. The parser has callbacks for eight different types of data in the digital audio data stream. Constants for these types are defined at the <a class="reference internal" href="#module-cd" title="cd: Interface to the CD-ROM on Silicon Graphics systems. (deprecated) (IRIX)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">cd</span></code></a> module level (see above). The callback is called as follows: <code class="docutils literal notranslate"><span class="pre">func(arg,</span> <span class="pre">type,</span> <span class="pre">data)</span></code>, where <em>arg</em> is the user supplied argument, <em>type</em> is the particular type of callback, and <em>data</em> is the data returned for this <em>type</em> of callback. The type of the data depends on the <em>type</em> of callback as follows:</p> <table class="docutils align-default"> <colgroup> <col style="width: 22%" /> <col style="width: 78%" /> </colgroup> <thead> <tr class="row-odd"><th class="head"><p>Type</p></th> <th class="head"><p>Value</p></th> </tr> </thead> <tbody> <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">audio</span></code></p></td> <td><p>String which can be passed unmodified to <code class="xref py py-func docutils literal notranslate"><span class="pre">al.writesamps()</span></code>.</p></td> </tr> <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">pnum</span></code></p></td> <td><p>Integer giving the program (track) number.</p></td> </tr> <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">index</span></code></p></td> <td><p>Integer giving the index number.</p></td> </tr> <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">ptime</span></code></p></td> <td><p>Tuple consisting of the program time in minutes, seconds, and frames.</p></td> </tr> <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">atime</span></code></p></td> <td><p>Tuple consisting of the absolute time in minutes, seconds, and frames.</p></td> </tr> <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">catalog</span></code></p></td> <td><p>String of 13 characters, giving the catalog number of the CD.</p></td> </tr> <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">ident</span></code></p></td> <td><p>String of 12 characters, giving the ISRC identification number of the recording. The string consists of two characters country code, three characters owner code, two characters giving the year, and five characters giving a serial number.</p></td> </tr> <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">control</span></code></p></td> <td><p>Integer giving the control bits from the CD subcode data</p></td> </tr> </tbody> </table> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">parser.deleteparser()</span></span></dt> <dd><p>Deletes the parser and frees the memory it was using. The object should not be used after this call. This call is done automatically when the last reference to the object is removed.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">parser.parseframe(frame)</span></span></dt> <dd><p>Parses one or more frames of digital audio data from a CD such as returned by <code class="xref py py-meth docutils literal notranslate"><span class="pre">readda()</span></code>. It determines which subcodes are present in the data. If these subcodes have changed since the last frame, then <code class="xref py py-meth docutils literal notranslate"><span class="pre">parseframe()</span></code> executes a callback of the appropriate type passing to it the subcode data found in the frame. Unlike the C function, more than one frame of digital audio data can be passed to this method.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">parser.removecallback(type)</span></span></dt> <dd><p>Removes the callback for the given <em>type</em>.</p> </dd></dl> <dl class="py method"> <dt class="sig sig-object py"> <span class="sig-name descname"><span class="pre">CD</span> <span class="pre">parser.resetparser()</span></span></dt> <dd><p>Resets the fields of the parser used for tracking subcodes to an initial state. <code class="xref py py-meth docutils literal notranslate"><span class="pre">resetparser()</span></code> should be called after the disc has been changed.</p> </dd></dl> </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="#">39.3. <code class="xref py py-mod docutils literal notranslate"><span class="pre">cd</span></code> — CD-ROM access on SGI systems</a><ul> <li><a class="reference internal" href="#player-objects">39.3.1. Player Objects</a></li> <li><a class="reference internal" href="#parser-objects">39.3.2. 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