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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
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bdb.rst.txt
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binascii.rst.txt
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binhex.rst.txt
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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
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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
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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
2.64
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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
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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
2.14
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runpy.rst.txt
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sched.rst.txt
4.54
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scrolledtext.rst.txt
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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
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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 : email.charset.rst.txt
:mod:`email.charset`: Representing character sets ------------------------------------------------- .. module:: email.charset :synopsis: Character Sets This module provides a class :class:`Charset` for representing character sets and character set conversions in email messages, as well as a character set registry and several convenience methods for manipulating this registry. Instances of :class:`Charset` are used in several other modules within the :mod:`email` package. Import this class from the :mod:`email.charset` module. .. versionadded:: 2.2.2 .. class:: Charset([input_charset]) Map character sets to their email properties. This class provides information about the requirements imposed on email for a specific character set. It also provides convenience routines for converting between character sets, given the availability of the applicable codecs. Given a character set, it will do its best to provide information on how to use that character set in an email message in an RFC-compliant way. Certain character sets must be encoded with quoted-printable or base64 when used in email headers or bodies. Certain character sets must be converted outright, and are not allowed in email. Optional *input_charset* is as described below; it is always coerced to lower case. After being alias normalized it is also used as a lookup into the registry of character sets to find out the header encoding, body encoding, and output conversion codec to be used for the character set. For example, if *input_charset* is ``iso-8859-1``, then headers and bodies will be encoded using quoted-printable and no output conversion codec is necessary. If *input_charset* is ``euc-jp``, then headers will be encoded with base64, bodies will not be encoded, but output text will be converted from the ``euc-jp`` character set to the ``iso-2022-jp`` character set. :class:`Charset` instances have the following data attributes: .. attribute:: input_charset The initial character set specified. Common aliases are converted to their *official* email names (e.g. ``latin_1`` is converted to ``iso-8859-1``). Defaults to 7-bit ``us-ascii``. .. attribute:: header_encoding If the character set must be encoded before it can be used in an email header, this attribute will be set to ``Charset.QP`` (for quoted-printable), ``Charset.BASE64`` (for base64 encoding), or ``Charset.SHORTEST`` for the shortest of QP or BASE64 encoding. Otherwise, it will be ``None``. .. attribute:: body_encoding Same as *header_encoding*, but describes the encoding for the mail message's body, which indeed may be different than the header encoding. ``Charset.SHORTEST`` is not allowed for *body_encoding*. .. attribute:: output_charset Some character sets must be converted before they can be used in email headers or bodies. If the *input_charset* is one of them, this attribute will contain the name of the character set output will be converted to. Otherwise, it will be ``None``. .. attribute:: input_codec The name of the Python codec used to convert the *input_charset* to Unicode. If no conversion codec is necessary, this attribute will be ``None``. .. attribute:: output_codec The name of the Python codec used to convert Unicode to the *output_charset*. If no conversion codec is necessary, this attribute will have the same value as the *input_codec*. :class:`Charset` instances also have the following methods: .. method:: get_body_encoding() Return the content transfer encoding used for body encoding. This is either the string ``quoted-printable`` or ``base64`` depending on the encoding used, or it is a function, in which case you should call the function with a single argument, the Message object being encoded. The function should then set the :mailheader:`Content-Transfer-Encoding` header itself to whatever is appropriate. Returns the string ``quoted-printable`` if *body_encoding* is ``QP``, returns the string ``base64`` if *body_encoding* is ``BASE64``, and returns the string ``7bit`` otherwise. .. method:: convert(s) Convert the string *s* from the *input_codec* to the *output_codec*. .. method:: to_splittable(s) Convert a possibly multibyte string to a safely splittable format. *s* is the string to split. Uses the *input_codec* to try and convert the string to Unicode, so it can be safely split on character boundaries (even for multibyte characters). Returns the string as-is if it isn't known how to convert *s* to Unicode with the *input_charset*. Characters that could not be converted to Unicode will be replaced with the Unicode replacement character ``'U+FFFD'``. .. method:: from_splittable(ustr[, to_output]) Convert a splittable string back into an encoded string. *ustr* is a Unicode string to "unsplit". This method uses the proper codec to try and convert the string from Unicode back into an encoded format. Return the string as-is if it is not Unicode, or if it could not be converted from Unicode. Characters that could not be converted from Unicode will be replaced with an appropriate character (usually ``'?'``). If *to_output* is ``True`` (the default), uses *output_codec* to convert to an encoded format. If *to_output* is ``False``, it uses *input_codec*. .. method:: get_output_charset() Return the output character set. This is the *output_charset* attribute if that is not ``None``, otherwise it is *input_charset*. .. method:: encoded_header_len() Return the length of the encoded header string, properly calculating for quoted-printable or base64 encoding. .. method:: header_encode(s[, convert]) Header-encode the string *s*. If *convert* is ``True``, the string will be converted from the input charset to the output charset automatically. This is not useful for multibyte character sets, which have line length issues (multibyte characters must be split on a character, not a byte boundary); use the higher-level :class:`~email.header.Header` class to deal with these issues (see :mod:`email.header`). *convert* defaults to ``False``. The type of encoding (base64 or quoted-printable) will be based on the *header_encoding* attribute. .. method:: body_encode(s[, convert]) Body-encode the string *s*. If *convert* is ``True`` (the default), the string will be converted from the input charset to output charset automatically. Unlike :meth:`header_encode`, there are no issues with byte boundaries and multibyte charsets in email bodies, so this is usually pretty safe. The type of encoding (base64 or quoted-printable) will be based on the *body_encoding* attribute. The :class:`Charset` class also provides a number of methods to support standard operations and built-in functions. .. method:: __str__() Returns *input_charset* as a string coerced to lower case. :meth:`__repr__` is an alias for :meth:`__str__`. .. method:: __eq__(other) This method allows you to compare two :class:`Charset` instances for equality. .. method:: __ne__(other) This method allows you to compare two :class:`Charset` instances for inequality. The :mod:`email.charset` module also provides the following functions for adding new entries to the global character set, alias, and codec registries: .. function:: add_charset(charset[, header_enc[, body_enc[, output_charset]]]) Add character properties to the global registry. *charset* is the input character set, and must be the canonical name of a character set. Optional *header_enc* and *body_enc* is either ``Charset.QP`` for quoted-printable, ``Charset.BASE64`` for base64 encoding, ``Charset.SHORTEST`` for the shortest of quoted-printable or base64 encoding, or ``None`` for no encoding. ``SHORTEST`` is only valid for *header_enc*. The default is ``None`` for no encoding. Optional *output_charset* is the character set that the output should be in. Conversions will proceed from input charset, to Unicode, to the output charset when the method :meth:`Charset.convert` is called. The default is to output in the same character set as the input. Both *input_charset* and *output_charset* must have Unicode codec entries in the module's character set-to-codec mapping; use :func:`add_codec` to add codecs the module does not know about. See the :mod:`codecs` module's documentation for more information. The global character set registry is kept in the module global dictionary ``CHARSETS``. .. function:: add_alias(alias, canonical) Add a character set alias. *alias* is the alias name, e.g. ``latin-1``. *canonical* is the character set's canonical name, e.g. ``iso-8859-1``. The global charset alias registry is kept in the module global dictionary ``ALIASES``. .. function:: add_codec(charset, codecname) Add a codec that map characters in the given character set to and from Unicode. *charset* is the canonical name of a character set. *codecname* is the name of a Python codec, as appropriate for the second argument to the :func:`unicode` built-in, or to the :meth:`~unicode.encode` method of a Unicode string.
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