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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 : cookielib.rst.txt
:mod:`cookielib` --- Cookie handling for HTTP clients ===================================================== .. module:: cookielib :synopsis: Classes for automatic handling of HTTP cookies. .. moduleauthor:: John J. Lee <jjl@pobox.com> .. sectionauthor:: John J. Lee <jjl@pobox.com> .. note:: The :mod:`cookielib` module has been renamed to :mod:`http.cookiejar` in Python 3. The :term:`2to3` tool will automatically adapt imports when converting your sources to Python 3. .. versionadded:: 2.4 **Source code:** :source:`Lib/cookielib.py` -------------- The :mod:`cookielib` module defines classes for automatic handling of HTTP cookies. It is useful for accessing web sites that require small pieces of data -- :dfn:`cookies` -- to be set on the client machine by an HTTP response from a web server, and then returned to the server in later HTTP requests. Both the regular Netscape cookie protocol and the protocol defined by :rfc:`2965` are handled. RFC 2965 handling is switched off by default. :rfc:`2109` cookies are parsed as Netscape cookies and subsequently treated either as Netscape or RFC 2965 cookies according to the 'policy' in effect. Note that the great majority of cookies on the Internet are Netscape cookies. :mod:`cookielib` attempts to follow the de-facto Netscape cookie protocol (which differs substantially from that set out in the original Netscape specification), including taking note of the ``max-age`` and ``port`` cookie-attributes introduced with RFC 2965. .. note:: The various named parameters found in :mailheader:`Set-Cookie` and :mailheader:`Set-Cookie2` headers (eg. ``domain`` and ``expires``) are conventionally referred to as :dfn:`attributes`. To distinguish them from Python attributes, the documentation for this module uses the term :dfn:`cookie-attribute` instead. The module defines the following exception: .. exception:: LoadError Instances of :class:`FileCookieJar` raise this exception on failure to load cookies from a file. .. note:: For backwards-compatibility with Python 2.4 (which raised an :exc:`IOError`), :exc:`LoadError` is a subclass of :exc:`IOError`. The following classes are provided: .. class:: CookieJar(policy=None) *policy* is an object implementing the :class:`CookiePolicy` interface. The :class:`CookieJar` class stores HTTP cookies. It extracts cookies from HTTP requests, and returns them in HTTP responses. :class:`CookieJar` instances automatically expire contained cookies when necessary. Subclasses are also responsible for storing and retrieving cookies from a file or database. .. class:: FileCookieJar(filename, delayload=None, policy=None) *policy* is an object implementing the :class:`CookiePolicy` interface. For the other arguments, see the documentation for the corresponding attributes. A :class:`CookieJar` which can load cookies from, and perhaps save cookies to, a file on disk. Cookies are **NOT** loaded from the named file until either the :meth:`load` or :meth:`revert` method is called. Subclasses of this class are documented in section :ref:`file-cookie-jar-classes`. .. class:: CookiePolicy() This class is responsible for deciding whether each cookie should be accepted from / returned to the server. .. class:: DefaultCookiePolicy( blocked_domains=None, allowed_domains=None, netscape=True, rfc2965=False, rfc2109_as_netscape=None, hide_cookie2=False, strict_domain=False, strict_rfc2965_unverifiable=True, strict_ns_unverifiable=False, strict_ns_domain=DefaultCookiePolicy.DomainLiberal, strict_ns_set_initial_dollar=False, strict_ns_set_path=False ) Constructor arguments should be passed as keyword arguments only. *blocked_domains* is a sequence of domain names that we never accept cookies from, nor return cookies to. *allowed_domains* if not :const:`None`, this is a sequence of the only domains for which we accept and return cookies. For all other arguments, see the documentation for :class:`CookiePolicy` and :class:`DefaultCookiePolicy` objects. :class:`DefaultCookiePolicy` implements the standard accept / reject rules for Netscape and RFC 2965 cookies. By default, RFC 2109 cookies (ie. cookies received in a :mailheader:`Set-Cookie` header with a version cookie-attribute of 1) are treated according to the RFC 2965 rules. However, if RFC 2965 handling is turned off or :attr:`rfc2109_as_netscape` is ``True``, RFC 2109 cookies are 'downgraded' by the :class:`CookieJar` instance to Netscape cookies, by setting the :attr:`version` attribute of the :class:`~cookielib.Cookie` instance to 0. :class:`DefaultCookiePolicy` also provides some parameters to allow some fine-tuning of policy. .. class:: Cookie() This class represents Netscape, RFC 2109 and RFC 2965 cookies. It is not expected that users of :mod:`cookielib` construct their own :class:`~cookielib.Cookie` instances. Instead, if necessary, call :meth:`make_cookies` on a :class:`CookieJar` instance. .. seealso:: Module :mod:`urllib2` URL opening with automatic cookie handling. Module :mod:`Cookie` HTTP cookie classes, principally useful for server-side code. The :mod:`cookielib` and :mod:`Cookie` modules do not depend on each other. https://curl.haxx.se/rfc/cookie_spec.html The specification of the original Netscape cookie protocol. Though this is still the dominant protocol, the 'Netscape cookie protocol' implemented by all the major browsers (and :mod:`cookielib`) only bears a passing resemblance to the one sketched out in ``cookie_spec.html``. :rfc:`2109` - HTTP State Management Mechanism Obsoleted by RFC 2965. Uses :mailheader:`Set-Cookie` with version=1. :rfc:`2965` - HTTP State Management Mechanism The Netscape protocol with the bugs fixed. Uses :mailheader:`Set-Cookie2` in place of :mailheader:`Set-Cookie`. Not widely used. http://kristol.org/cookie/errata.html Unfinished errata to RFC 2965. :rfc:`2964` - Use of HTTP State Management .. _cookie-jar-objects: CookieJar and FileCookieJar Objects ----------------------------------- :class:`CookieJar` objects support the :term:`iterator` protocol for iterating over contained :class:`~cookielib.Cookie` objects. :class:`CookieJar` has the following methods: .. method:: CookieJar.add_cookie_header(request) Add correct :mailheader:`Cookie` header to *request*. If policy allows (ie. the :attr:`rfc2965` and :attr:`hide_cookie2` attributes of the :class:`CookieJar`'s :class:`CookiePolicy` instance are true and false respectively), the :mailheader:`Cookie2` header is also added when appropriate. The *request* object (usually a :class:`urllib2.Request` instance) must support the methods :meth:`get_full_url`, :meth:`get_host`, :meth:`get_type`, :meth:`unverifiable`, :meth:`get_origin_req_host`, :meth:`has_header`, :meth:`get_header`, :meth:`header_items`, and :meth:`add_unredirected_header`,as documented by :mod:`urllib2`. .. method:: CookieJar.extract_cookies(response, request) Extract cookies from HTTP *response* and store them in the :class:`CookieJar`, where allowed by policy. The :class:`CookieJar` will look for allowable :mailheader:`Set-Cookie` and :mailheader:`Set-Cookie2` headers in the *response* argument, and store cookies as appropriate (subject to the :meth:`CookiePolicy.set_ok` method's approval). The *response* object (usually the result of a call to :meth:`urllib2.urlopen`, or similar) should support an :meth:`info` method, which returns an object with a :meth:`getallmatchingheaders` method (usually a :class:`mimetools.Message` instance). The *request* object (usually a :class:`urllib2.Request` instance) must support the methods :meth:`get_full_url`, :meth:`get_host`, :meth:`unverifiable`, and :meth:`get_origin_req_host`, as documented by :mod:`urllib2`. The request is used to set default values for cookie-attributes as well as for checking that the cookie is allowed to be set. .. method:: CookieJar.set_policy(policy) Set the :class:`CookiePolicy` instance to be used. .. method:: CookieJar.make_cookies(response, request) Return sequence of :class:`~cookielib.Cookie` objects extracted from *response* object. See the documentation for :meth:`extract_cookies` for the interfaces required of the *response* and *request* arguments. .. method:: CookieJar.set_cookie_if_ok(cookie, request) Set a :class:`~cookielib.Cookie` if policy says it's OK to do so. .. method:: CookieJar.set_cookie(cookie) Set a :class:`~cookielib.Cookie`, without checking with policy to see whether or not it should be set. .. method:: CookieJar.clear([domain[, path[, name]]]) Clear some cookies. If invoked without arguments, clear all cookies. If given a single argument, only cookies belonging to that *domain* will be removed. If given two arguments, cookies belonging to the specified *domain* and URL *path* are removed. If given three arguments, then the cookie with the specified *domain*, *path* and *name* is removed. Raises :exc:`KeyError` if no matching cookie exists. .. method:: CookieJar.clear_session_cookies() Discard all session cookies. Discards all contained cookies that have a true :attr:`discard` attribute (usually because they had either no ``max-age`` or ``expires`` cookie-attribute, or an explicit ``discard`` cookie-attribute). For interactive browsers, the end of a session usually corresponds to closing the browser window. Note that the :meth:`save` method won't save session cookies anyway, unless you ask otherwise by passing a true *ignore_discard* argument. :class:`FileCookieJar` implements the following additional methods: .. method:: FileCookieJar.save(filename=None, ignore_discard=False, ignore_expires=False) Save cookies to a file. This base class raises :exc:`NotImplementedError`. Subclasses may leave this method unimplemented. *filename* is the name of file in which to save cookies. If *filename* is not specified, :attr:`self.filename` is used (whose default is the value passed to the constructor, if any); if :attr:`self.filename` is :const:`None`, :exc:`ValueError` is raised. *ignore_discard*: save even cookies set to be discarded. *ignore_expires*: save even cookies that have expired The file is overwritten if it already exists, thus wiping all the cookies it contains. Saved cookies can be restored later using the :meth:`load` or :meth:`revert` methods. .. method:: FileCookieJar.load(filename=None, ignore_discard=False, ignore_expires=False) Load cookies from a file. Old cookies are kept unless overwritten by newly loaded ones. Arguments are as for :meth:`save`. The named file must be in the format understood by the class, or :exc:`LoadError` will be raised. Also, :exc:`IOError` may be raised, for example if the file does not exist. .. note:: For backwards-compatibility with Python 2.4 (which raised an :exc:`IOError`), :exc:`LoadError` is a subclass of :exc:`IOError`. .. method:: FileCookieJar.revert(filename=None, ignore_discard=False, ignore_expires=False) Clear all cookies and reload cookies from a saved file. :meth:`revert` can raise the same exceptions as :meth:`load`. If there is a failure, the object's state will not be altered. :class:`FileCookieJar` instances have the following public attributes: .. attribute:: FileCookieJar.filename Filename of default file in which to keep cookies. This attribute may be assigned to. .. attribute:: FileCookieJar.delayload If true, load cookies lazily from disk. This attribute should not be assigned to. This is only a hint, since this only affects performance, not behaviour (unless the cookies on disk are changing). A :class:`CookieJar` object may ignore it. None of the :class:`FileCookieJar` classes included in the standard library lazily loads cookies. .. _file-cookie-jar-classes: FileCookieJar subclasses and co-operation with web browsers ----------------------------------------------------------- The following :class:`CookieJar` subclasses are provided for reading and writing. .. class:: MozillaCookieJar(filename, delayload=None, policy=None) A :class:`FileCookieJar` that can load from and save cookies to disk in the Mozilla ``cookies.txt`` file format (which is also used by the Lynx and Netscape browsers). .. note:: Version 3 of the Firefox web browser no longer writes cookies in the ``cookies.txt`` file format. .. note:: This loses information about RFC 2965 cookies, and also about newer or non-standard cookie-attributes such as ``port``. .. warning:: Back up your cookies before saving if you have cookies whose loss / corruption would be inconvenient (there are some subtleties which may lead to slight changes in the file over a load / save round-trip). Also note that cookies saved while Mozilla is running will get clobbered by Mozilla. .. class:: LWPCookieJar(filename, delayload=None, policy=None) A :class:`FileCookieJar` that can load from and save cookies to disk in format compatible with the libwww-perl library's ``Set-Cookie3`` file format. This is convenient if you want to store cookies in a human-readable file. .. _cookie-policy-objects: CookiePolicy Objects -------------------- Objects implementing the :class:`CookiePolicy` interface have the following methods: .. method:: CookiePolicy.set_ok(cookie, request) Return boolean value indicating whether cookie should be accepted from server. *cookie* is a :class:`cookielib.Cookie` instance. *request* is an object implementing the interface defined by the documentation for :meth:`CookieJar.extract_cookies`. .. method:: CookiePolicy.return_ok(cookie, request) Return boolean value indicating whether cookie should be returned to server. *cookie* is a :class:`cookielib.Cookie` instance. *request* is an object implementing the interface defined by the documentation for :meth:`CookieJar.add_cookie_header`. .. method:: CookiePolicy.domain_return_ok(domain, request) Return false if cookies should not be returned, given cookie domain. This method is an optimization. It removes the need for checking every cookie with a particular domain (which might involve reading many files). Returning true from :meth:`domain_return_ok` and :meth:`path_return_ok` leaves all the work to :meth:`return_ok`. If :meth:`domain_return_ok` returns true for the cookie domain, :meth:`path_return_ok` is called for the cookie path. Otherwise, :meth:`path_return_ok` and :meth:`return_ok` are never called for that cookie domain. If :meth:`path_return_ok` returns true, :meth:`return_ok` is called with the :class:`~cookielib.Cookie` object itself for a full check. Otherwise, :meth:`return_ok` is never called for that cookie path. Note that :meth:`domain_return_ok` is called for every *cookie* domain, not just for the *request* domain. For example, the function might be called with both ``".example.com"`` and ``"www.example.com"`` if the request domain is ``"www.example.com"``. The same goes for :meth:`path_return_ok`. The *request* argument is as documented for :meth:`return_ok`. .. method:: CookiePolicy.path_return_ok(path, request) Return false if cookies should not be returned, given cookie path. See the documentation for :meth:`domain_return_ok`. In addition to implementing the methods above, implementations of the :class:`CookiePolicy` interface must also supply the following attributes, indicating which protocols should be used, and how. All of these attributes may be assigned to. .. attribute:: CookiePolicy.netscape Implement Netscape protocol. .. attribute:: CookiePolicy.rfc2965 Implement RFC 2965 protocol. .. attribute:: CookiePolicy.hide_cookie2 Don't add :mailheader:`Cookie2` header to requests (the presence of this header indicates to the server that we understand RFC 2965 cookies). The most useful way to define a :class:`CookiePolicy` class is by subclassing from :class:`DefaultCookiePolicy` and overriding some or all of the methods above. :class:`CookiePolicy` itself may be used as a 'null policy' to allow setting and receiving any and all cookies (this is unlikely to be useful). .. _default-cookie-policy-objects: DefaultCookiePolicy Objects --------------------------- Implements the standard rules for accepting and returning cookies. Both RFC 2965 and Netscape cookies are covered. RFC 2965 handling is switched off by default. The easiest way to provide your own policy is to override this class and call its methods in your overridden implementations before adding your own additional checks:: import cookielib class MyCookiePolicy(cookielib.DefaultCookiePolicy): def set_ok(self, cookie, request): if not cookielib.DefaultCookiePolicy.set_ok(self, cookie, request): return False if i_dont_want_to_store_this_cookie(cookie): return False return True In addition to the features required to implement the :class:`CookiePolicy` interface, this class allows you to block and allow domains from setting and receiving cookies. There are also some strictness switches that allow you to tighten up the rather loose Netscape protocol rules a little bit (at the cost of blocking some benign cookies). A domain blacklist and whitelist is provided (both off by default). Only domains not in the blacklist and present in the whitelist (if the whitelist is active) participate in cookie setting and returning. Use the *blocked_domains* constructor argument, and :meth:`blocked_domains` and :meth:`set_blocked_domains` methods (and the corresponding argument and methods for *allowed_domains*). If you set a whitelist, you can turn it off again by setting it to :const:`None`. Domains in block or allow lists that do not start with a dot must equal the cookie domain to be matched. For example, ``"example.com"`` matches a blacklist entry of ``"example.com"``, but ``"www.example.com"`` does not. Domains that do start with a dot are matched by more specific domains too. For example, both ``"www.example.com"`` and ``"www.coyote.example.com"`` match ``".example.com"`` (but ``"example.com"`` itself does not). IP addresses are an exception, and must match exactly. For example, if blocked_domains contains ``"192.168.1.2"`` and ``".168.1.2"``, 192.168.1.2 is blocked, but 193.168.1.2 is not. :class:`DefaultCookiePolicy` implements the following additional methods: .. method:: DefaultCookiePolicy.blocked_domains() Return the sequence of blocked domains (as a tuple). .. method:: DefaultCookiePolicy.set_blocked_domains(blocked_domains) Set the sequence of blocked domains. .. method:: DefaultCookiePolicy.is_blocked(domain) Return whether *domain* is on the blacklist for setting or receiving cookies. .. method:: DefaultCookiePolicy.allowed_domains() Return :const:`None`, or the sequence of allowed domains (as a tuple). .. method:: DefaultCookiePolicy.set_allowed_domains(allowed_domains) Set the sequence of allowed domains, or :const:`None`. .. method:: DefaultCookiePolicy.is_not_allowed(domain) Return whether *domain* is not on the whitelist for setting or receiving cookies. :class:`DefaultCookiePolicy` instances have the following attributes, which are all initialised from the constructor arguments of the same name, and which may all be assigned to. .. attribute:: DefaultCookiePolicy.rfc2109_as_netscape If true, request that the :class:`CookieJar` instance downgrade RFC 2109 cookies (ie. cookies received in a :mailheader:`Set-Cookie` header with a version cookie-attribute of 1) to Netscape cookies by setting the version attribute of the :class:`~cookielib.Cookie` instance to 0. The default value is :const:`None`, in which case RFC 2109 cookies are downgraded if and only if RFC 2965 handling is turned off. Therefore, RFC 2109 cookies are downgraded by default. .. versionadded:: 2.5 General strictness switches: .. attribute:: DefaultCookiePolicy.strict_domain Don't allow sites to set two-component domains with country-code top-level domains like ``.co.uk``, ``.gov.uk``, ``.co.nz``.etc. This is far from perfect and isn't guaranteed to work! RFC 2965 protocol strictness switches: .. attribute:: DefaultCookiePolicy.strict_rfc2965_unverifiable Follow RFC 2965 rules on unverifiable transactions (usually, an unverifiable transaction is one resulting from a redirect or a request for an image hosted on another site). If this is false, cookies are *never* blocked on the basis of verifiability Netscape protocol strictness switches: .. attribute:: DefaultCookiePolicy.strict_ns_unverifiable Apply RFC 2965 rules on unverifiable transactions even to Netscape cookies. .. attribute:: DefaultCookiePolicy.strict_ns_domain Flags indicating how strict to be with domain-matching rules for Netscape cookies. See below for acceptable values. .. attribute:: DefaultCookiePolicy.strict_ns_set_initial_dollar Ignore cookies in Set-Cookie: headers that have names starting with ``'$'``. .. attribute:: DefaultCookiePolicy.strict_ns_set_path Don't allow setting cookies whose path doesn't path-match request URI. :attr:`strict_ns_domain` is a collection of flags. Its value is constructed by or-ing together (for example, ``DomainStrictNoDots|DomainStrictNonDomain`` means both flags are set). .. attribute:: DefaultCookiePolicy.DomainStrictNoDots When setting cookies, the 'host prefix' must not contain a dot (eg. ``www.foo.bar.com`` can't set a cookie for ``.bar.com``, because ``www.foo`` contains a dot). .. attribute:: DefaultCookiePolicy.DomainStrictNonDomain Cookies that did not explicitly specify a ``domain`` cookie-attribute can only be returned to a domain equal to the domain that set the cookie (eg. ``spam.example.com`` won't be returned cookies from ``example.com`` that had no ``domain`` cookie-attribute). .. attribute:: DefaultCookiePolicy.DomainRFC2965Match When setting cookies, require a full RFC 2965 domain-match. The following attributes are provided for convenience, and are the most useful combinations of the above flags: .. attribute:: DefaultCookiePolicy.DomainLiberal Equivalent to 0 (ie. all of the above Netscape domain strictness flags switched off). .. attribute:: DefaultCookiePolicy.DomainStrict Equivalent to ``DomainStrictNoDots|DomainStrictNonDomain``. .. _cookielib-cookie-objects: Cookie Objects -------------- :class:`~cookielib.Cookie` instances have Python attributes roughly corresponding to the standard cookie-attributes specified in the various cookie standards. The correspondence is not one-to-one, because there are complicated rules for assigning default values, because the ``max-age`` and ``expires`` cookie-attributes contain equivalent information, and because RFC 2109 cookies may be 'downgraded' by :mod:`cookielib` from version 1 to version 0 (Netscape) cookies. Assignment to these attributes should not be necessary other than in rare circumstances in a :class:`CookiePolicy` method. The class does not enforce internal consistency, so you should know what you're doing if you do that. .. attribute:: Cookie.version Integer or :const:`None`. Netscape cookies have :attr:`version` 0. RFC 2965 and RFC 2109 cookies have a ``version`` cookie-attribute of 1. However, note that :mod:`cookielib` may 'downgrade' RFC 2109 cookies to Netscape cookies, in which case :attr:`version` is 0. .. attribute:: Cookie.name Cookie name (a string). .. attribute:: Cookie.value Cookie value (a string), or :const:`None`. .. attribute:: Cookie.port String representing a port or a set of ports (eg. '80', or '80,8080'), or :const:`None`. .. attribute:: Cookie.path Cookie path (a string, eg. ``'/acme/rocket_launchers'``). .. attribute:: Cookie.secure ``True`` if cookie should only be returned over a secure connection. .. attribute:: Cookie.expires Integer expiry date in seconds since epoch, or :const:`None`. See also the :meth:`is_expired` method. .. attribute:: Cookie.discard ``True`` if this is a session cookie. .. attribute:: Cookie.comment String comment from the server explaining the function of this cookie, or :const:`None`. .. attribute:: Cookie.comment_url URL linking to a comment from the server explaining the function of this cookie, or :const:`None`. .. attribute:: Cookie.rfc2109 ``True`` if this cookie was received as an RFC 2109 cookie (ie. the cookie arrived in a :mailheader:`Set-Cookie` header, and the value of the Version cookie-attribute in that header was 1). This attribute is provided because :mod:`cookielib` may 'downgrade' RFC 2109 cookies to Netscape cookies, in which case :attr:`version` is 0. .. versionadded:: 2.5 .. attribute:: Cookie.port_specified ``True`` if a port or set of ports was explicitly specified by the server (in the :mailheader:`Set-Cookie` / :mailheader:`Set-Cookie2` header). .. attribute:: Cookie.domain_specified ``True`` if a domain was explicitly specified by the server. .. attribute:: Cookie.domain_initial_dot ``True`` if the domain explicitly specified by the server began with a dot (``'.'``). Cookies may have additional non-standard cookie-attributes. These may be accessed using the following methods: .. method:: Cookie.has_nonstandard_attr(name) Return true if cookie has the named cookie-attribute. .. method:: Cookie.get_nonstandard_attr(name, default=None) If cookie has the named cookie-attribute, return its value. Otherwise, return *default*. .. method:: Cookie.set_nonstandard_attr(name, value) Set the value of the named cookie-attribute. The :class:`~cookielib.Cookie` class also defines the following method: .. method:: Cookie.is_expired([now=None]) ``True`` if cookie has passed the time at which the server requested it should expire. If *now* is given (in seconds since the epoch), return whether the cookie has expired at the specified time. .. _cookielib-examples: Examples -------- The first example shows the most common usage of :mod:`cookielib`:: import cookielib, urllib2 cj = cookielib.CookieJar() opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj)) r = opener.open("http://example.com/") This example illustrates how to open a URL using your Netscape, Mozilla, or Lynx cookies (assumes Unix/Netscape convention for location of the cookies file):: import os, cookielib, urllib2 cj = cookielib.MozillaCookieJar() cj.load(os.path.join(os.path.expanduser("~"), ".netscape", "cookies.txt")) opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj)) r = opener.open("http://example.com/") The next example illustrates the use of :class:`DefaultCookiePolicy`. Turn on RFC 2965 cookies, be more strict about domains when setting and returning Netscape cookies, and block some domains from setting cookies or having them returned:: import urllib2 from cookielib import CookieJar, DefaultCookiePolicy policy = DefaultCookiePolicy( rfc2965=True, strict_ns_domain=DefaultCookiePolicy.DomainStrict, blocked_domains=["ads.net", ".ads.net"]) cj = CookieJar(policy) opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj)) r = opener.open("http://example.com/")
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