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abc.rst.txt	11805	0644	editdlrm
aifc.rst.txt	7503	0644	editdlrm
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ast.rst.txt	10159	0644	editdlrm
asynchat.rst.txt	8528	0644	editdlrm
asyncio-dev.rst.txt	13398	0644	editdlrm
asyncio-eventloop.rst.txt	33701	0644	editdlrm
asyncio-eventloops.rst.txt	7660	0644	editdlrm
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asyncio.rst.txt	2272	0644	editdlrm
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atexit.rst.txt	3669	0644	editdlrm
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code.rst.txt	7817	0644	editdlrm
codecs.rst.txt	75564	0644	editdlrm
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collections.abc.rst.txt	12861	0644	editdlrm
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crypt.rst.txt	5122	0644	editdlrm
crypto.rst.txt	411	0644	editdlrm
csv.rst.txt	19902	0644	editdlrm
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dbm.rst.txt	14293	0644	editdlrm
debug.rst.txt	471	0644	editdlrm
decimal.rst.txt	74869	0644	editdlrm
development.rst.txt	704	0644	editdlrm
difflib.rst.txt	29861	0644	editdlrm
dis.rst.txt	32567	0644	editdlrm
distribution.rst.txt	452	0644	editdlrm
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doctest.rst.txt	71743	0644	editdlrm
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email.contentmanager.rst.txt	9112	0644	editdlrm
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email.examples.rst.txt	1915	0644	editdlrm
email.generator.rst.txt	13637	0644	editdlrm
email.header.rst.txt	9188	0644	editdlrm
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email.iterators.rst.txt	2795	0644	editdlrm
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email.mime.rst.txt	11721	0644	editdlrm
email.parser.rst.txt	14092	0644	editdlrm
email.policy.rst.txt	27022	0644	editdlrm
email.rst.txt	6785	0644	editdlrm
email.util.rst.txt	9214	0644	editdlrm
ensurepip.rst.txt	4987	0644	editdlrm
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exceptions.rst.txt	25570	0644	editdlrm
faulthandler.rst.txt	6136	0644	editdlrm
fcntl.rst.txt	7152	0644	editdlrm
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fnmatch.rst.txt	3103	0644	editdlrm
formatter.rst.txt	13242	0644	editdlrm
fpectl.rst.txt	4180	0644	editdlrm
fractions.rst.txt	6364	0644	editdlrm
frameworks.rst.txt	391	0644	editdlrm
ftplib.rst.txt	17552	0644	editdlrm
functional.rst.txt	365	0644	editdlrm
functions.rst.txt	71621	0644	editdlrm
functools.rst.txt	18503	0644	editdlrm
gc.rst.txt	9694	0644	editdlrm
getopt.rst.txt	6557	0644	editdlrm
getpass.rst.txt	1882	0644	editdlrm
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glob.rst.txt	3508	0644	editdlrm
grp.rst.txt	2417	0644	editdlrm
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hashlib.rst.txt	26523	0644	editdlrm
heapq.rst.txt	13402	0644	editdlrm
hmac.rst.txt	4020	0644	editdlrm
html.entities.rst.txt	1319	0644	editdlrm
html.parser.rst.txt	11275	0644	editdlrm
html.rst.txt	1304	0644	editdlrm
http.client.rst.txt	18870	0644	editdlrm
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http.rst.txt	7096	0644	editdlrm
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i18n.rst.txt	408	0644	editdlrm
idle.rst.txt	25834	0644	editdlrm
imaplib.rst.txt	20367	0644	editdlrm
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imp.rst.txt	15548	0644	editdlrm
importlib.rst.txt	53563	0644	editdlrm
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ipc.rst.txt	649	0644	editdlrm
itertools.rst.txt	38459	0644	editdlrm
json.rst.txt	27876	0644	editdlrm
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language.rst.txt	522	0644	editdlrm
linecache.rst.txt	2408	0644	editdlrm
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logging.config.rst.txt	33886	0644	editdlrm
logging.handlers.rst.txt	42497	0644	editdlrm
logging.rst.txt	60479	0644	editdlrm
lzma.rst.txt	17361	0644	editdlrm
macpath.rst.txt	707	0644	editdlrm
mailbox.rst.txt	63055	0644	editdlrm
mailcap.rst.txt	3691	0644	editdlrm
markup.rst.txt	679	0644	editdlrm
marshal.rst.txt	4855	0644	editdlrm
math.rst.txt	14375	0644	editdlrm
mimetypes.rst.txt	9839	0644	editdlrm
misc.rst.txt	247	0644	editdlrm
mm.rst.txt	431	0644	editdlrm
mmap.rst.txt	11232	0644	editdlrm
modulefinder.rst.txt	3240	0644	editdlrm
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msilib.rst.txt	18612	0644	editdlrm
msvcrt.rst.txt	4392	0644	editdlrm
multiprocessing.rst.txt	104494	0644	editdlrm
netdata.rst.txt	339	0644	editdlrm
netrc.rst.txt	3007	0644	editdlrm
nis.rst.txt	1993	0644	editdlrm
nntplib.rst.txt	21821	0644	editdlrm
numbers.rst.txt	8089	0644	editdlrm
numeric.rst.txt	696	0644	editdlrm
operator.rst.txt	18989	0644	editdlrm
optparse.rst.txt	76996	0644	editdlrm
os.path.rst.txt	16419	0644	editdlrm
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ossaudiodev.rst.txt	17845	0644	editdlrm
othergui.rst.txt	2822	0644	editdlrm
parser.rst.txt	15148	0644	editdlrm
pathlib.rst.txt	30045	0644	editdlrm
pdb.rst.txt	19454	0644	editdlrm
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pickle.rst.txt	37440	0644	editdlrm
pickletools.rst.txt	3729	0644	editdlrm
pipes.rst.txt	2557	0644	editdlrm
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platform.rst.txt	9624	0644	editdlrm
plistlib.rst.txt	7398	0644	editdlrm
poplib.rst.txt	8197	0644	editdlrm
posix.rst.txt	3694	0644	editdlrm
pprint.rst.txt	14274	0644	editdlrm
profile.rst.txt	27969	0644	editdlrm
pty.rst.txt	3123	0644	editdlrm
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pyclbr.rst.txt	3297	0644	editdlrm
pydoc.rst.txt	4688	0644	editdlrm
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python.rst.txt	475	0644	editdlrm
py_compile.rst.txt	3851	0644	editdlrm
queue.rst.txt	7268	0644	editdlrm
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random.rst.txt	18503	0644	editdlrm
re.rst.txt	64936	0644	editdlrm
readline.rst.txt	11943	0644	editdlrm
reprlib.rst.txt	5162	0644	editdlrm
resource.rst.txt	12291	0644	editdlrm
rlcompleter.rst.txt	2294	0644	editdlrm
runpy.rst.txt	8285	0644	editdlrm
sched.rst.txt	4842	0644	editdlrm
secrets.rst.txt	5930	0644	editdlrm
select.rst.txt	28175	0644	editdlrm
selectors.rst.txt	8925	0644	editdlrm
shelve.rst.txt	8390	0644	editdlrm
shlex.rst.txt	16441	0644	editdlrm
shutil.rst.txt	26014	0644	editdlrm
signal.rst.txt	17218	0644	editdlrm
site.rst.txt	9628	0644	editdlrm
smtpd.rst.txt	10806	0644	editdlrm
smtplib.rst.txt	23439	0644	editdlrm
sndhdr.rst.txt	1994	0644	editdlrm
socket.rst.txt	68202	0644	editdlrm
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sqlite3.rst.txt	39215	0644	editdlrm
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string.rst.txt	35374	0644	editdlrm
stringprep.rst.txt	4279	0644	editdlrm
struct.rst.txt	19581	0644	editdlrm
subprocess.rst.txt	45793	0644	editdlrm
sunau.rst.txt	7390	0644	editdlrm
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sys.rst.txt	58273	0644	editdlrm
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__future__.rst.txt	5245	0644	editdlrm
__main__.rst.txt	904	0644	editdlrm

:mod:`email.generator`: Generating MIME documents ------------------------------------------------- .. module:: email.generator :synopsis: Generate flat text email messages from a message structure. **Source code:** :source:`Lib/email/generator.py` -------------- One of the most common tasks is to generate the flat (serialized) version of the email message represented by a message object structure. You will need to do this if you want to send your message via :meth:`smtplib.SMTP.sendmail` or the :mod:`nntplib` module, or print the message on the console. Taking a message object structure and producing a serialized representation is the job of the generator classes. As with the :mod:`email.parser` module, you aren't limited to the functionality of the bundled generator; you could write one from scratch yourself. However the bundled generator knows how to generate most email in a standards-compliant way, should handle MIME and non-MIME email messages just fine, and is designed so that the bytes-oriented parsing and generation operations are inverses, assuming the same non-transforming :mod:`~email.policy` is used for both. That is, parsing the serialized byte stream via the :class:`~email.parser.BytesParser` class and then regenerating the serialized byte stream using :class:`BytesGenerator` should produce output identical to the input [#]_. (On the other hand, using the generator on an :class:`~email.message.EmailMessage` constructed by program may result in changes to the :class:`~email.message.EmailMessage` object as defaults are filled in.) The :class:`Generator` class can be used to flatten a message into a text (as opposed to binary) serialized representation, but since Unicode cannot represent binary data directly, the message is of necessity transformed into something that contains only ASCII characters, using the standard email RFC Content Transfer Encoding techniques for encoding email messages for transport over channels that are not "8 bit clean". .. class:: BytesGenerator(outfp, mangle_from_=None, maxheaderlen=None, *, \ policy=None) Return a :class:`BytesGenerator` object that will write any message provided to the :meth:`flatten` method, or any surrogateescape encoded text provided to the :meth:`write` method, to the :term:`file-like object` *outfp*. *outfp* must support a ``write`` method that accepts binary data. If optional *mangle_from_* is ``True``, put a ``>`` character in front of any line in the body that starts with the exact string ``"From "``, that is ``From`` followed by a space at the beginning of a line. *mangle_from_* defaults to the value of the :attr:`~email.policy.Policy.mangle_from_` setting of the *policy* (which is ``True`` for the :data:`~email.policy.compat32` policy and ``False`` for all others). *mangle_from_* is intended for use when messages are stored in unix mbox format (see :mod:`mailbox` and `WHY THE CONTENT-LENGTH FORMAT IS BAD `_). If *maxheaderlen* is not ``None``, refold any header lines that are longer than *maxheaderlen*, or if ``0``, do not rewrap any headers. If *manheaderlen* is ``None`` (the default), wrap headers and other message lines according to the *policy* settings. If *policy* is specified, use that policy to control message generation. If *policy* is ``None`` (the default), use the policy associated with the :class:`~email.message.Message` or :class:`~email.message.EmailMessage` object passed to ``flatten`` to control the message generation. See :mod:`email.policy` for details on what *policy* controls. .. versionadded:: 3.2 .. versionchanged:: 3.3 Added the *policy* keyword. .. versionchanged:: 3.6 The default behavior of the *mangle_from_* and *maxheaderlen* parameters is to follow the policy. .. method:: flatten(msg, unixfrom=False, linesep=None) Print the textual representation of the message object structure rooted at *msg* to the output file specified when the :class:`BytesGenerator` instance was created. If the :mod:`~email.policy` option :attr:`~email.policy.Policy.cte_type` is ``8bit`` (the default), copy any headers in the original parsed message that have not been modified to the output with any bytes with the high bit set reproduced as in the original, and preserve the non-ASCII :mailheader:`Content-Transfer-Encoding` of any body parts that have them. If ``cte_type`` is ``7bit``, convert the bytes with the high bit set as needed using an ASCII-compatible :mailheader:`Content-Transfer-Encoding`. That is, transform parts with non-ASCII :mailheader:`Content-Transfer-Encoding` (:mailheader:`Content-Transfer-Encoding: 8bit`) to an ASCII compatible :mailheader:`Content-Transfer-Encoding`, and encode RFC-invalid non-ASCII bytes in headers using the MIME ``unknown-8bit`` character set, thus rendering them RFC-compliant. .. XXX: There should be an option that just does the RFC compliance transformation on headers but leaves CTE 8bit parts alone. If *unixfrom* is ``True``, print the envelope header delimiter used by the Unix mailbox format (see :mod:`mailbox`) before the first of the :rfc:`5322` headers of the root message object. If the root object has no envelope header, craft a standard one. The default is ``False``. Note that for subparts, no envelope header is ever printed. If *linesep* is not ``None``, use it as the separator character between all the lines of the flattened message. If *linesep* is ``None`` (the default), use the value specified in the *policy*. .. XXX: flatten should take a *policy* keyword. .. method:: clone(fp) Return an independent clone of this :class:`BytesGenerator` instance with the exact same option settings, and *fp* as the new *outfp*. .. method:: write(s) Encode *s* using the ``ASCII`` codec and the ``surrogateescape`` error handler, and pass it to the *write* method of the *outfp* passed to the :class:`BytesGenerator`'s constructor. As a convenience, :class:`~email.message.EmailMessage` provides the methods :meth:`~email.message.EmailMessage.as_bytes` and ``bytes(aMessage)`` (a.k.a. :meth:`~email.message.EmailMessage.__bytes__`), which simplify the generation of a serialized binary representation of a message object. For more detail, see :mod:`email.message`. Because strings cannot represent binary data, the :class:`Generator` class must convert any binary data in any message it flattens to an ASCII compatible format, by converting them to an ASCII compatible :mailheader:`Content-Transfer_Encoding`. Using the terminology of the email RFCs, you can think of this as :class:`Generator` serializing to an I/O stream that is not "8 bit clean". In other words, most applications will want to be using :class:`BytesGenerator`, and not :class:`Generator`. .. class:: Generator(outfp, mangle_from_=None, maxheaderlen=None, *, \ policy=None) Return a :class:`Generator` object that will write any message provided to the :meth:`flatten` method, or any text provided to the :meth:`write` method, to the :term:`file-like object` *outfp*. *outfp* must support a ``write`` method that accepts string data. If optional *mangle_from_* is ``True``, put a ``>`` character in front of any line in the body that starts with the exact string ``"From "``, that is ``From`` followed by a space at the beginning of a line. *mangle_from_* defaults to the value of the :attr:`~email.policy.Policy.mangle_from_` setting of the *policy* (which is ``True`` for the :data:`~email.policy.compat32` policy and ``False`` for all others). *mangle_from_* is intended for use when messages are stored in unix mbox format (see :mod:`mailbox` and `WHY THE CONTENT-LENGTH FORMAT IS BAD `_). If *maxheaderlen* is not ``None``, refold any header lines that are longer than *maxheaderlen*, or if ``0``, do not rewrap any headers. If *manheaderlen* is ``None`` (the default), wrap headers and other message lines according to the *policy* settings. If *policy* is specified, use that policy to control message generation. If *policy* is ``None`` (the default), use the policy associated with the :class:`~email.message.Message` or :class:`~email.message.EmailMessage` object passed to ``flatten`` to control the message generation. See :mod:`email.policy` for details on what *policy* controls. .. versionchanged:: 3.3 Added the *policy* keyword. .. versionchanged:: 3.6 The default behavior of the *mangle_from_* and *maxheaderlen* parameters is to follow the policy. .. method:: flatten(msg, unixfrom=False, linesep=None) Print the textual representation of the message object structure rooted at *msg* to the output file specified when the :class:`Generator` instance was created. If the :mod:`~email.policy` option :attr:`~email.policy.Policy.cte_type` is ``8bit``, generate the message as if the option were set to ``7bit``. (This is required because strings cannot represent non-ASCII bytes.) Convert any bytes with the high bit set as needed using an ASCII-compatible :mailheader:`Content-Transfer-Encoding`. That is, transform parts with non-ASCII :mailheader:`Cotnent-Transfer-Encoding` (:mailheader:`Content-Transfer-Encoding: 8bit`) to an ASCII compatible :mailheader:`Content-Transfer-Encoding`, and encode RFC-invalid non-ASCII bytes in headers using the MIME ``unknown-8bit`` character set, thus rendering them RFC-compliant. If *unixfrom* is ``True``, print the envelope header delimiter used by the Unix mailbox format (see :mod:`mailbox`) before the first of the :rfc:`5322` headers of the root message object. If the root object has no envelope header, craft a standard one. The default is ``False``. Note that for subparts, no envelope header is ever printed. If *linesep* is not ``None``, use it as the separator character between all the lines of the flattened message. If *linesep* is ``None`` (the default), use the value specified in the *policy*. .. XXX: flatten should take a *policy* keyword. .. versionchanged:: 3.2 Added support for re-encoding ``8bit`` message bodies, and the *linesep* argument. .. method:: clone(fp) Return an independent clone of this :class:`Generator` instance with the exact same options, and *fp* as the new *outfp*. .. method:: write(s) Write *s* to the *write* method of the *outfp* passed to the :class:`Generator`'s constructor. This provides just enough file-like API for :class:`Generator` instances to be used in the :func:`print` function. As a convenience, :class:`~email.message.EmailMessage` provides the methods :meth:`~email.message.EmailMessage.as_string` and ``str(aMessage)`` (a.k.a. :meth:`~email.message.EmailMessage.__str__`), which simplify the generation of a formatted string representation of a message object. For more detail, see :mod:`email.message`. The :mod:`email.generator` module also provides a derived class, :class:`DecodedGenerator`, which is like the :class:`Generator` base class, except that non-\ :mimetype:`text` parts are not serialized, but are instead represented in the output stream by a string derived from a template filled in with information about the part. .. class:: DecodedGenerator(outfp, mangle_from_=None, maxheaderlen=None, \ fmt=None, *, policy=None) Act like :class:`Generator`, except that for any subpart of the message passed to :meth:`Generator.flatten`, if the subpart is of main type :mimetype:`text`, print the decoded payload of the subpart, and if the main type is not :mimetype:`text`, instead of printing it fill in the string *fmt* using information from the part and print the resulting filled-in string. To fill in *fmt*, execute ``fmt % part_info``, where ``part_info`` is a dictionary composed of the following keys and values: * ``type`` -- Full MIME type of the non-\ :mimetype:`text` part * ``maintype`` -- Main MIME type of the non-\ :mimetype:`text` part * ``subtype`` -- Sub-MIME type of the non-\ :mimetype:`text` part * ``filename`` -- Filename of the non-\ :mimetype:`text` part * ``description`` -- Description associated with the non-\ :mimetype:`text` part * ``encoding`` -- Content transfer encoding of the non-\ :mimetype:`text` part If *fmt* is ``None``, use the following default *fmt*: "[Non-text (%(type)s) part of message omitted, filename %(filename)s]" Optional *_mangle_from_* and *maxheaderlen* are as with the :class:`Generator` base class. .. rubric:: Footnotes .. [#] This statement assumes that you use the appropriate setting for ``unixfrom``, and that there are no :mod:`policy` settings calling for automatic adjustments (for example, :attr:`~email.policy.Policy.refold_source` must be ``none``, which is *not* the default). It is also not 100% true, since if the message does not conform to the RFC standards occasionally information about the exact original text is lost during parsing error recovery. It is a goal to fix these latter edge cases when possible.