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2to3.rst.txt
14.3
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__builtin__.rst.txt
1.46
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__future__.rst.txt
4.84
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__main__.rst.txt
535
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_winreg.rst.txt
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abc.rst.txt
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aepack.rst.txt
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aetools.rst.txt
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aetypes.rst.txt
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aifc.rst.txt
6.92
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al.rst.txt
5.18
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allos.rst.txt
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anydbm.rst.txt
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archiving.rst.txt
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argparse.rst.txt
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array.rst.txt
10.28
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ast.rst.txt
10.23
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asynchat.rst.txt
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asyncore.rst.txt
12.63
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atexit.rst.txt
3.82
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audioop.rst.txt
10.15
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autogil.rst.txt
1015
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base64.rst.txt
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basehttpserver.rst.txt
10.16
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bastion.rst.txt
2.55
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bdb.rst.txt
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binascii.rst.txt
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binhex.rst.txt
1.87
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bisect.rst.txt
5.29
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bsddb.rst.txt
7.4
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bz2.rst.txt
7.88
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calendar.rst.txt
11.02
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carbon.rst.txt
15.58
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cd.rst.txt
11.69
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cgi.rst.txt
22.32
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cgihttpserver.rst.txt
2.72
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cgitb.rst.txt
2.81
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chunk.rst.txt
4.84
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cmath.rst.txt
7.47
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cmd.rst.txt
8.36
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code.rst.txt
6.95
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codecs.rst.txt
65.4
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codeop.rst.txt
3.69
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collections.rst.txt
40.48
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colorpicker.rst.txt
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colorsys.rst.txt
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commands.rst.txt
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compileall.rst.txt
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compiler.rst.txt
36.59
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configparser.rst.txt
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constants.rst.txt
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contextlib.rst.txt
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cookie.rst.txt
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cookielib.rst.txt
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copy.rst.txt
3.27
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copy_reg.rst.txt
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crypt.rst.txt
2.24
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crypto.rst.txt
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csv.rst.txt
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ctypes.rst.txt
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curses.ascii.rst.txt
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curses.panel.rst.txt
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curses.rst.txt
73.12
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custominterp.rst.txt
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datatypes.rst.txt
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datetime.rst.txt
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dbhash.rst.txt
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dbm.rst.txt
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debug.rst.txt
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decimal.rst.txt
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development.rst.txt
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difflib.rst.txt
30
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dircache.rst.txt
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dis.rst.txt
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distribution.rst.txt
426
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distutils.rst.txt
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dl.rst.txt
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doctest.rst.txt
72.25
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docxmlrpcserver.rst.txt
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dumbdbm.rst.txt
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dummy_thread.rst.txt
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dummy_threading.rst.txt
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easydialogs.rst.txt
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email-examples.rst.txt
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email.charset.rst.txt
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email.encoders.rst.txt
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email.errors.rst.txt
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email.generator.rst.txt
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email.header.rst.txt
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email.iterators.rst.txt
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email.message.rst.txt
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email.mime.rst.txt
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email.parser.rst.txt
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email.rst.txt
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email.utils.rst.txt
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ensurepip.rst.txt
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errno.rst.txt
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exceptions.rst.txt
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fcntl.rst.txt
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filecmp.rst.txt
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fileformats.rst.txt
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fileinput.rst.txt
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filesys.rst.txt
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fl.rst.txt
17.23
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fm.rst.txt
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fnmatch.rst.txt
3.03
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formatter.rst.txt
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fpectl.rst.txt
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fpformat.rst.txt
1.71
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fractions.rst.txt
5.17
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framework.rst.txt
11.18
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frameworks.rst.txt
378
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ftplib.rst.txt
15.35
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functions.rst.txt
73.75
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functools.rst.txt
7.27
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future_builtins.rst.txt
1.96
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gc.rst.txt
8.8
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gdbm.rst.txt
4.77
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gensuitemodule.rst.txt
3.04
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getopt.rst.txt
6.51
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getpass.rst.txt
1.83
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gettext.rst.txt
28.36
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gl.rst.txt
5.87
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glob.rst.txt
2.36
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grp.rst.txt
2.2
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gzip.rst.txt
4.71
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hashlib.rst.txt
7.21
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heapq.rst.txt
12.88
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hmac.rst.txt
3
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hotshot.rst.txt
4.19
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htmllib.rst.txt
7.21
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htmlparser.rst.txt
11.37
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httplib.rst.txt
36.58
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i18n.rst.txt
409
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ic.rst.txt
4.89
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idle.rst.txt
21.66
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imageop.rst.txt
3.91
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imaplib.rst.txt
16.82
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imgfile.rst.txt
2.7
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imghdr.rst.txt
2.57
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imp.rst.txt
12.3
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importlib.rst.txt
1.1
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imputil.rst.txt
6.86
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index.rst.txt
2.23
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inspect.rst.txt
27.49
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internet.rst.txt
950
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intro.rst.txt
2.74
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io.rst.txt
38.11
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ipc.rst.txt
630
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itertools.rst.txt
35.67
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jpeg.rst.txt
3.77
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json.rst.txt
24.95
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keyword.rst.txt
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language.rst.txt
523
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linecache.rst.txt
1.84
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locale.rst.txt
24.39
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logging.config.rst.txt
30.82
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logging.handlers.rst.txt
27.49
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logging.rst.txt
45.78
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mac.rst.txt
791
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macos.rst.txt
3.73
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macosa.rst.txt
3.87
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macostools.rst.txt
3.92
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macpath.rst.txt
650
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mailbox.rst.txt
66.53
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mailcap.rst.txt
3.59
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markup.rst.txt
1.22
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marshal.rst.txt
5.56
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math.rst.txt
10.66
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md5.rst.txt
2.75
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mhlib.rst.txt
3.87
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mimetools.rst.txt
4.4
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mimetypes.rst.txt
9.61
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mimewriter.rst.txt
3.28
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mimify.rst.txt
3.44
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miniaeframe.rst.txt
2.5
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misc.rst.txt
248
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mm.rst.txt
447
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mmap.rst.txt
10.24
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modulefinder.rst.txt
3.3
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modules.rst.txt
382
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msilib.rst.txt
18.62
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msvcrt.rst.txt
4.24
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multifile.rst.txt
6.46
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multiprocessing.rst.txt
90.45
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mutex.rst.txt
1.89
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netdata.rst.txt
432
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netrc.rst.txt
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new.rst.txt
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nis.rst.txt
2.06
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nntplib.rst.txt
14.19
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numbers.rst.txt
7.82
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numeric.rst.txt
751
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operator.rst.txt
21.57
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optparse.rst.txt
75.29
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os.path.rst.txt
12.79
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os.rst.txt
80.64
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ossaudiodev.rst.txt
16.9
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othergui.rst.txt
2.66
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parser.rst.txt
15.02
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pdb.rst.txt
15.67
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persistence.rst.txt
826
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pickle.rst.txt
36.39
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pickletools.rst.txt
1.95
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pipes.rst.txt
3.7
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pkgutil.rst.txt
7.53
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platform.rst.txt
9.33
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plistlib.rst.txt
4.04
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popen2.rst.txt
6.86
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poplib.rst.txt
6.07
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posix.rst.txt
3.54
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posixfile.rst.txt
7.03
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pprint.rst.txt
8.86
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profile.rst.txt
27.99
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pty.rst.txt
1.72
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pwd.rst.txt
2.66
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py_compile.rst.txt
2.42
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pyclbr.rst.txt
3.22
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pydoc.rst.txt
3.99
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pyexpat.rst.txt
28.21
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python.rst.txt
514
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queue.rst.txt
6.87
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quopri.rst.txt
2.61
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random.rst.txt
13.01
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re.rst.txt
53.81
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readline.rst.txt
10.27
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repr.rst.txt
4.61
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resource.rst.txt
9.37
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restricted.rst.txt
3.25
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rexec.rst.txt
11.47
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rfc822.rst.txt
13.71
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rlcompleter.rst.txt
2.44
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robotparser.rst.txt
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runpy.rst.txt
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sched.rst.txt
4.54
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scrolledtext.rst.txt
1.35
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select.rst.txt
20.26
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sets.rst.txt
14.62
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sgi.rst.txt
322
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sgmllib.rst.txt
10.41
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sha.rst.txt
2.74
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shelve.rst.txt
8.12
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shlex.rst.txt
11.05
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shutil.rst.txt
13.17
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signal.rst.txt
10.47
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simplehttpserver.rst.txt
4.45
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simplexmlrpcserver.rst.txt
10.63
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site.rst.txt
7.7
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smtpd.rst.txt
2.41
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smtplib.rst.txt
14.56
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sndhdr.rst.txt
1.72
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socket.rst.txt
39.81
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socketserver.rst.txt
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someos.rst.txt
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spwd.rst.txt
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sqlite3.rst.txt
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ssl.rst.txt
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stat.rst.txt
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statvfs.rst.txt
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stdtypes.rst.txt
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string.rst.txt
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stringio.rst.txt
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stringprep.rst.txt
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strings.rst.txt
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struct.rst.txt
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subprocess.rst.txt
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sun.rst.txt
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sunau.rst.txt
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sunaudio.rst.txt
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symbol.rst.txt
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symtable.rst.txt
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sys.rst.txt
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sysconfig.rst.txt
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syslog.rst.txt
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tabnanny.rst.txt
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tarfile.rst.txt
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telnetlib.rst.txt
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tempfile.rst.txt
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termios.rst.txt
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test.rst.txt
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textwrap.rst.txt
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thread.rst.txt
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threading.rst.txt
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time.rst.txt
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timeit.rst.txt
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tix.rst.txt
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tk.rst.txt
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tkinter.rst.txt
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token.rst.txt
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tokenize.rst.txt
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trace.rst.txt
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traceback.rst.txt
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ttk.rst.txt
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tty.rst.txt
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turtle.rst.txt
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types.rst.txt
6.05
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undoc.rst.txt
6.4
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unicodedata.rst.txt
5.59
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unittest.rst.txt
81.01
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unix.rst.txt
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urllib.rst.txt
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urllib2.rst.txt
34.39
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urlparse.rst.txt
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user.rst.txt
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userdict.rst.txt
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uu.rst.txt
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uuid.rst.txt
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warnings.rst.txt
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wave.rst.txt
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weakref.rst.txt
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webbrowser.rst.txt
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whichdb.rst.txt
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windows.rst.txt
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winsound.rst.txt
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wsgiref.rst.txt
29.85
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xdrlib.rst.txt
7.89
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xml.dom.minidom.rst.txt
10.95
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xml.dom.pulldom.rst.txt
1.53
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xml.dom.rst.txt
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xml.etree.elementtree.rst.txt
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Code Editor : xml.dom.minidom.rst.txt
:mod:`xml.dom.minidom` --- Minimal DOM implementation ===================================================== .. module:: xml.dom.minidom :synopsis: Minimal Document Object Model (DOM) implementation. .. moduleauthor:: Paul Prescod <paul@prescod.net> .. sectionauthor:: Paul Prescod <paul@prescod.net> .. sectionauthor:: Martin v. Löwis <martin@v.loewis.de> .. versionadded:: 2.0 **Source code:** :source:`Lib/xml/dom/minidom.py` -------------- :mod:`xml.dom.minidom` is a minimal implementation of the Document Object Model interface, with an API similar to that in other languages. It is intended to be simpler than the full DOM and also significantly smaller. Users who are not already proficient with the DOM should consider using the :mod:`xml.etree.ElementTree` module for their XML processing instead. .. warning:: The :mod:`xml.dom.minidom` module is not secure against maliciously constructed data. If you need to parse untrusted or unauthenticated data see :ref:`xml-vulnerabilities`. DOM applications typically start by parsing some XML into a DOM. With :mod:`xml.dom.minidom`, this is done through the parse functions:: from xml.dom.minidom import parse, parseString dom1 = parse('c:\\temp\\mydata.xml') # parse an XML file by name datasource = open('c:\\temp\\mydata.xml') dom2 = parse(datasource) # parse an open file dom3 = parseString('<myxml>Some data<empty/> some more data</myxml>') The :func:`parse` function can take either a filename or an open file object. .. function:: parse(filename_or_file[, parser[, bufsize]]) Return a :class:`Document` from the given input. *filename_or_file* may be either a file name, or a file-like object. *parser*, if given, must be a SAX2 parser object. This function will change the document handler of the parser and activate namespace support; other parser configuration (like setting an entity resolver) must have been done in advance. If you have XML in a string, you can use the :func:`parseString` function instead: .. function:: parseString(string[, parser]) Return a :class:`Document` that represents the *string*. This method creates a :class:`~StringIO.StringIO` object for the string and passes that on to :func:`parse`. Both functions return a :class:`Document` object representing the content of the document. What the :func:`parse` and :func:`parseString` functions do is connect an XML parser with a "DOM builder" that can accept parse events from any SAX parser and convert them into a DOM tree. The name of the functions are perhaps misleading, but are easy to grasp when learning the interfaces. The parsing of the document will be completed before these functions return; it's simply that these functions do not provide a parser implementation themselves. You can also create a :class:`Document` by calling a method on a "DOM Implementation" object. You can get this object either by calling the :func:`getDOMImplementation` function in the :mod:`xml.dom` package or the :mod:`xml.dom.minidom` module. Using the implementation from the :mod:`xml.dom.minidom` module will always return a :class:`Document` instance from the minidom implementation, while the version from :mod:`xml.dom` may provide an alternate implementation (this is likely if you have the `PyXML package <http://pyxml.sourceforge.net/>`_ installed). Once you have a :class:`Document`, you can add child nodes to it to populate the DOM:: from xml.dom.minidom import getDOMImplementation impl = getDOMImplementation() newdoc = impl.createDocument(None, "some_tag", None) top_element = newdoc.documentElement text = newdoc.createTextNode('Some textual content.') top_element.appendChild(text) Once you have a DOM document object, you can access the parts of your XML document through its properties and methods. These properties are defined in the DOM specification. The main property of the document object is the :attr:`documentElement` property. It gives you the main element in the XML document: the one that holds all others. Here is an example program:: dom3 = parseString("<myxml>Some data</myxml>") assert dom3.documentElement.tagName == "myxml" When you are finished with a DOM tree, you may optionally call the :meth:`unlink` method to encourage early cleanup of the now-unneeded objects. :meth:`unlink` is an :mod:`xml.dom.minidom`\ -specific extension to the DOM API that renders the node and its descendants are essentially useless. Otherwise, Python's garbage collector will eventually take care of the objects in the tree. .. seealso:: `Document Object Model (DOM) Level 1 Specification <https://www.w3.org/TR/REC-DOM-Level-1/>`_ The W3C recommendation for the DOM supported by :mod:`xml.dom.minidom`. .. _minidom-objects: DOM Objects ----------- The definition of the DOM API for Python is given as part of the :mod:`xml.dom` module documentation. This section lists the differences between the API and :mod:`xml.dom.minidom`. .. method:: Node.unlink() Break internal references within the DOM so that it will be garbage collected on versions of Python without cyclic GC. Even when cyclic GC is available, using this can make large amounts of memory available sooner, so calling this on DOM objects as soon as they are no longer needed is good practice. This only needs to be called on the :class:`Document` object, but may be called on child nodes to discard children of that node. .. method:: Node.writexml(writer, indent="", addindent="", newl="") Write XML to the writer object. The writer should have a :meth:`write` method which matches that of the file object interface. The *indent* parameter is the indentation of the current node. The *addindent* parameter is the incremental indentation to use for subnodes of the current one. The *newl* parameter specifies the string to use to terminate newlines. For the :class:`Document` node, an additional keyword argument *encoding* can be used to specify the encoding field of the XML header. .. versionchanged:: 2.1 The optional keyword parameters *indent*, *addindent*, and *newl* were added to support pretty output. .. versionchanged:: 2.3 For the :class:`Document` node, an additional keyword argument *encoding* can be used to specify the encoding field of the XML header. .. method:: Node.toxml([encoding]) Return the XML that the DOM represents as a string. With no argument, the XML header does not specify an encoding, and the result is Unicode string if the default encoding cannot represent all characters in the document. Encoding this string in an encoding other than UTF-8 is likely incorrect, since UTF-8 is the default encoding of XML. With an explicit *encoding* [1]_ argument, the result is a byte string in the specified encoding. It is recommended that this argument is always specified. To avoid :exc:`UnicodeError` exceptions in case of unrepresentable text data, the encoding argument should be specified as "utf-8". .. versionchanged:: 2.3 the *encoding* argument was introduced; see :meth:`writexml`. .. method:: Node.toprettyxml(indent="\\t", newl="\\n", encoding=None) Return a pretty-printed version of the document. *indent* specifies the indentation string and defaults to a tabulator; *newl* specifies the string emitted at the end of each line and defaults to ``\n``. .. versionadded:: 2.1 .. versionchanged:: 2.3 the encoding argument was introduced; see :meth:`writexml`. The following standard DOM methods have special considerations with :mod:`xml.dom.minidom`: .. method:: Node.cloneNode(deep) Although this method was present in the version of :mod:`xml.dom.minidom` packaged with Python 2.0, it was seriously broken. This has been corrected for subsequent releases. .. _dom-example: DOM Example ----------- This example program is a fairly realistic example of a simple program. In this particular case, we do not take much advantage of the flexibility of the DOM. .. literalinclude:: ../includes/minidom-example.py .. _minidom-and-dom: minidom and the DOM standard ---------------------------- The :mod:`xml.dom.minidom` module is essentially a DOM 1.0-compatible DOM with some DOM 2 features (primarily namespace features). Usage of the DOM interface in Python is straight-forward. The following mapping rules apply: * Interfaces are accessed through instance objects. Applications should not instantiate the classes themselves; they should use the creator functions available on the :class:`Document` object. Derived interfaces support all operations (and attributes) from the base interfaces, plus any new operations. * Operations are used as methods. Since the DOM uses only :keyword:`in` parameters, the arguments are passed in normal order (from left to right). There are no optional arguments. ``void`` operations return ``None``. * IDL attributes map to instance attributes. For compatibility with the OMG IDL language mapping for Python, an attribute ``foo`` can also be accessed through accessor methods :meth:`_get_foo` and :meth:`_set_foo`. ``readonly`` attributes must not be changed; this is not enforced at runtime. * The types ``short int``, ``unsigned int``, ``unsigned long long``, and ``boolean`` all map to Python integer objects. * The type ``DOMString`` maps to Python strings. :mod:`xml.dom.minidom` supports either byte or Unicode strings, but will normally produce Unicode strings. Values of type ``DOMString`` may also be ``None`` where allowed to have the IDL ``null`` value by the DOM specification from the W3C. * ``const`` declarations map to variables in their respective scope (e.g. ``xml.dom.minidom.Node.PROCESSING_INSTRUCTION_NODE``); they must not be changed. * ``DOMException`` is currently not supported in :mod:`xml.dom.minidom`. Instead, :mod:`xml.dom.minidom` uses standard Python exceptions such as :exc:`TypeError` and :exc:`AttributeError`. * :class:`NodeList` objects are implemented using Python's built-in list type. Starting with Python 2.2, these objects provide the interface defined in the DOM specification, but with earlier versions of Python they do not support the official API. They are, however, much more "Pythonic" than the interface defined in the W3C recommendations. The following interfaces have no implementation in :mod:`xml.dom.minidom`: * :class:`DOMTimeStamp` * :class:`DocumentType` (added in Python 2.1) * :class:`DOMImplementation` (added in Python 2.1) * :class:`CharacterData` * :class:`CDATASection` * :class:`Notation` * :class:`Entity` * :class:`EntityReference` * :class:`DocumentFragment` Most of these reflect information in the XML document that is not of general utility to most DOM users. .. rubric:: Footnotes .. [1] The encoding string included in XML output should conform to the appropriate standards. For example, "UTF-8" is valid, but "UTF8" is not. See https://www.w3.org/TR/2006/REC-xml11-20060816/#NT-EncodingDecl and https://www.iana.org/assignments/character-sets/character-sets.xhtml.
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