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#
Copyright (C) 2001 Python Software Foundation
#
This file is distributed under the same license as the Python package.
#
#
Translators:
msgid ""
msgstr ""
"
Project-Id-Version
:
Python 3.14\n
"
"
Report-Msgid-Bugs-To
:
\n
"
"
POT-Creation-Date
:
2026-08-13 00:20+0000\n
"
"
PO-Revision-Date
:
2018-05-23 14:44+0000\n
"
"
Last-Translator
:
Adrian Liaw <adrianliaw2000@gmail.com>\n
"
"
Language-Team
:
Chinese - TAIWAN (https://github.com/python/python-docs-zh-
"
"
tw)\n
"
"
Language
:
zh_TW\n
"
"
MIME-Version
:
1.0\n
"
"
Content-Type
:
text/plain; charset=UTF-8\n
"
"
Content-Transfer-Encoding
:
8bit\n
"
"
Plural-Forms
:
nplurals=1; plural=0;\n
"
#:
../../library/email.headerregistry.rst:2
msgid
":mod:`!email.headerregistry`: Custom Header Objects"
msgstr
":mod:`!email.headerregistry`：自訂標頭物件"
#:
../../library/email.headerregistry.rst:10
msgid
"**Source code:** :source:`Lib/email/headerregistry.py`"
msgstr
"**原始碼：**
\\
:source:`Lib/email/headerregistry.py`"
#:
../../library/email.headerregistry.rst:14
msgid
"[1]_"
msgstr
"[1]_"
#:
../../library/email.headerregistry.rst:16
msgid
""
"Headers are represented by customized subclasses of :class:`str`. The "
"particular class used to represent a given header is determined by the :attr:"
"`~email.policy.EmailPolicy.header_factory` of the :mod:`~email.policy` in "
"effect when the headers are created. This section documents the particular "
"``header_factory`` implemented by the email package for handling :RFC:`5322` "
"compliant email messages, which not only provides customized header objects "
"for various header types, but also provides an extension mechanism for "
"applications to add their own custom header types."
msgstr
""
#:
../../library/email.headerregistry.rst:25
msgid
""
"When using any of the policy objects derived from :data:`~email.policy."
"EmailPolicy`, all headers are produced by :class:`.HeaderRegistry` and have :"
"class:`.BaseHeader` as their last base class. Each header class has an "
"additional base class that is determined by the type of the header. For "
"example, many headers have the class :class:`.UnstructuredHeader` as their "
"other base class. The specialized second class for a header is determined "
"by the name of the header, using a lookup table stored in the :class:`."
"HeaderRegistry`. All of this is managed transparently for the typical "
"application program, but interfaces are provided for modifying the default "
"behavior for use by more complex applications."
msgstr
""
#:
../../library/email.headerregistry.rst:36
msgid
""
"The sections below first document the header base classes and their "
"attributes, followed by the API for modifying the behavior of :class:`."
"HeaderRegistry`, and finally the support classes used to represent the data "
"parsed from structured headers."
msgstr
""
#:
../../library/email.headerregistry.rst:44
msgid
""
"*name* and *value* are passed to ``BaseHeader`` from the :attr:`~email."
"policy.EmailPolicy.header_factory` call. The string value of any header "
"object is the *value* fully decoded to a string."
msgstr
""
#:
../../library/email.headerregistry.rst:48
msgid
"This base class defines the following read-only properties:"
msgstr
"這個基底類別定義了以下唯讀屬性："
#:
../../library/email.headerregistry.rst:53
msgid
""
"The name of the header (the portion of the field before the ':'). This is "
"exactly the value passed in the :attr:`~email.policy.EmailPolicy."
"header_factory` call for *name*; that is, case is preserved."
msgstr
""
#:
../../library/email.headerregistry.rst:61
msgid
""
"A tuple of :exc:`~email.errors.HeaderDefect` instances reporting any RFC "
"compliance problems found during parsing. The email package tries to be "
"complete about detecting compliance issues. See the :mod:`~email.errors` "
"module for a discussion of the types of defects that may be reported."
msgstr
""
#:
../../library/email.headerregistry.rst:69
msgid
""
"The maximum number of headers of this type that can have the same ``name``. "
"A value of ``None`` means unlimited. The ``BaseHeader`` value for this "
"attribute is ``None``; it is expected that specialized header classes will "
"override this value as needed."
msgstr
""
#:
../../library/email.headerregistry.rst:74
msgid
""
"``BaseHeader`` also provides the following method, which is called by the "
"email library code and should not in general be called by application "
"programs:"
msgstr
""
#:
../../library/email.headerregistry.rst:80
msgid
""
"Return a string containing :attr:`~email.policy.Policy.linesep` characters "
"as required to correctly fold the header according to *policy*. A :attr:"
"`~email.policy.Policy.cte_type` of ``8bit`` will be treated as if it were "
"``7bit``, since headers may not contain arbitrary binary data. If :attr:"
"`~email.policy.EmailPolicy.utf8` is ``False``, non-ASCII data will be :rfc:"
"`2047` encoded."
msgstr
""
#:
../../library/email.headerregistry.rst:88
msgid
""
"``BaseHeader`` by itself cannot be used to create a header object. It "
"defines a protocol that each specialized header cooperates with in order to "
"produce the header object. Specifically, ``BaseHeader`` requires that the "
"specialized class provide a :func:`classmethod` named ``parse``. This "
"method is called as follows::"
msgstr
""
#:
../../library/email.headerregistry.rst:94
msgid
"parse(string, kwds)"
msgstr
"parse(string, kwds)"
#:
../../library/email.headerregistry.rst:96
msgid
""
"``kwds`` is a dictionary containing one pre-initialized key, ``defects``. "
"``defects`` is an empty list. The parse method should append any detected "
"defects to this list. On return, the ``kwds`` dictionary *must* contain "
"values for at least the keys ``decoded``, ``defects`` and ``parse_tree``. "
"``decoded`` should be the string value for the header (that is, the header "
"value fully decoded to a string). ``parse_tree`` is set to the parse tree "
"obtained from parsing the header. The parse method should assume that "
"*string* may contain content-transfer-encoded parts, but should correctly "
"handle all valid Unicode characters as well so that it can parse un-encoded "
"header values."
msgstr
""
#:
../../library/email.headerregistry.rst:106
msgid
""
"``BaseHeader``'s ``__new__`` then creates the header instance, and calls its "
"``init`` method. The specialized class only needs to provide an ``init`` "
"method if it wishes to set additional attributes beyond those provided by "
"``BaseHeader`` itself. Such an ``init`` method should look like this::"
msgstr
""
#:
../../library/email.headerregistry.rst:111
msgid
""
"def init(self, /, *args, **kw):\n"
" self._myattr = kw.pop('myattr')\n"
" super().init(*args, **kw)"
msgstr
""
"def init(self, /, *args, **kw):\n"
" self._myattr = kw.pop('myattr')\n"
" super().init(*args, **kw)"
#:
../../library/email.headerregistry.rst:115
msgid
""
"That is, anything extra that the specialized class puts in to the ``kwds`` "
"dictionary should be removed and handled, and the remaining contents of "
"``kw`` (and ``args``) passed to the ``BaseHeader`` ``init`` method."
msgstr
""
#:
../../library/email.headerregistry.rst:122
msgid
""
"An
\"
unstructured
\"
header is the default type of header in :rfc:`5322`. Any "
"header that does not have a specified syntax is treated as unstructured. "
"The classic example of an unstructured header is the :mailheader:`Subject` "
"header."
msgstr
""
#:
../../library/email.headerregistry.rst:127
msgid
""
"In :rfc:`5322`, an unstructured header is a run of arbitrary text in the "
"ASCII character set. :rfc:`2047`, however, has an :rfc:`5322` compatible "
"mechanism for encoding non-ASCII text as ASCII characters within a header "
"value. When a *value* containing encoded words is passed to the "
"constructor, the ``UnstructuredHeader`` parser converts such encoded words "
"into a string, following the :rfc:`2047` rules for unstructured text. The "
"parser uses heuristics to attempt to decode certain non-compliant encoded "
"words. Defects are registered in such cases, as well as defects for issues "
"such as invalid characters within the encoded words or the non-encoded text."
msgstr
""
#:
../../library/email.headerregistry.rst:137
msgid
"This header type provides no additional attributes."
msgstr
""
#:
../../library/email.headerregistry.rst:142
msgid
""
":rfc:`5322` specifies a very specific format for dates within email headers. "
"The ``DateHeader`` parser recognizes that date format, as well as "
"recognizing a number of variant forms that are sometimes found
\"
in the "
"wild
\"
."
msgstr
""
#:
../../library/email.headerregistry.rst:147
#:
../../library/email.headerregistry.rst:189
msgid
"This header type provides the following additional attributes:"
msgstr
""
#:
../../library/email.headerregistry.rst:151
msgid
""
"If the header value can be recognized as a valid date of one form or "
"another, this attribute will contain a :class:`~datetime.datetime` instance "
"representing that date. If the timezone of the input date is specified as "
"``-0000`` (indicating it is in UTC but contains no information about the "
"source timezone), then :attr:`.datetime` will be a naive :class:`~datetime."
"datetime`. If a specific timezone offset is found (including ``+0000``), "
"then :attr:`.datetime` will contain an aware ``datetime`` that uses :class:"
"`datetime.timezone` to record the timezone offset."
msgstr
""
#:
../../library/email.headerregistry.rst:161
msgid
""
"The ``decoded`` value of the header is determined by formatting the "
"``datetime`` according to the :rfc:`5322` rules; that is, it is set to::"
msgstr
""
#:
../../library/email.headerregistry.rst:164
msgid
"email.utils.format_datetime(self.datetime)"
msgstr
""
#:
../../library/email.headerregistry.rst:166
msgid
""
"When creating a ``DateHeader``, *value* may be :class:`~datetime.datetime` "
"instance. This means, for example, that the following code is valid and "
"does what one would expect::"
msgstr
""
#:
../../library/email.headerregistry.rst:170
msgid
"msg['Date'] = datetime(2011, 7, 15, 21)"
msgstr
"msg['Date'] = datetime(2011, 7, 15, 21)"
#:
../../library/email.headerregistry.rst:172
msgid
""
"Because this is a naive ``datetime`` it will be interpreted as a UTC "
"timestamp, and the resulting value will have a timezone of ``-0000``. Much "
"more useful is to use the :func:`~email.utils.localtime` function from the :"
"mod:`~email.utils` module::"
msgstr
""
#:
../../library/email.headerregistry.rst:177
msgid
"msg['Date'] = utils.localtime()"
msgstr
"msg['Date'] = utils.localtime()"
#:
../../library/email.headerregistry.rst:179
msgid
""
"This example sets the date header to the current time and date using the "
"current timezone offset."
msgstr
""
#:
../../library/email.headerregistry.rst:185
msgid
""
"Address headers are one of the most complex structured header types. The "
"``AddressHeader`` class provides a generic interface to any address header."
msgstr
""
#:
../../library/email.headerregistry.rst:194
msgid
""
"A tuple of :class:`.Group` objects encoding the addresses and groups found "
"in the header value. Addresses that are not part of a group are represented "
"in this list as single-address ``Groups`` whose :attr:`~.Group.display_name` "
"is ``None``."
msgstr
""
#:
../../library/email.headerregistry.rst:202
msgid
""
"A tuple of :class:`.Address` objects encoding all of the individual "
"addresses from the header value. If the header value contains any groups, "
"the individual addresses from the group are included in the list at the "
"point where the group occurs in the value (that is, the list of addresses is "
"
\"
flattened
\"
into a one dimensional list)."
msgstr
""
#:
../../library/email.headerregistry.rst:208
msgid
""
"The ``decoded`` value of the header will have all encoded words decoded to a "
"string. :class:`~encodings.idna` encoded domain names are also decoded to a "
"string. The ``decoded`` value is set by :ref:`joining <meth-str-join>` the :"
"class:`str` value of the elements of the ``groups`` attribute with ``', '``."
msgstr
""
#:
../../library/email.headerregistry.rst:214
msgid
""
"A list of :class:`.Address` and :class:`.Group` objects in any combination "
"may be used to set the value of an address header. ``Group`` objects whose "
"``display_name`` is ``None`` will be interpreted as single addresses, which "
"allows an address list to be copied with groups intact by using the list "
"obtained from the ``groups`` attribute of the source header."
msgstr
""
#:
../../library/email.headerregistry.rst:223
msgid
""
"A subclass of :class:`.AddressHeader` that adds one additional attribute:"
msgstr
""
#:
../../library/email.headerregistry.rst:229
msgid
""
"The single address encoded by the header value. If the header value "
"actually contains more than one address (which would be a violation of the "
"RFC under the default :mod:`~email.policy`), accessing this attribute will "
"result in a :exc:`ValueError`."
msgstr
""
#:
../../library/email.headerregistry.rst:235
msgid
""
"Many of the above classes also have a ``Unique`` variant (for example, "
"``UniqueUnstructuredHeader``). The only difference is that in the "
"``Unique`` variant, :attr:`~.BaseHeader.max_count` is set to 1."
msgstr
""
#:
../../library/email.headerregistry.rst:242
msgid
""
"There is really only one valid value for the :mailheader:`MIME-Version` "
"header, and that is ``1.0``. For future proofing, this header class "
"supports other valid version numbers. If a version number has a valid value "
"per :rfc:`2045`, then the header object will have non-``None`` values for "
"the following attributes:"
msgstr
""
#:
../../library/email.headerregistry.rst:250
msgid
""
"The version number as a string, with any whitespace and/or comments removed."
msgstr
""
#:
../../library/email.headerregistry.rst:255
msgid
"The major version number as an integer"
msgstr
""
#:
../../library/email.headerregistry.rst:259
msgid
"The minor version number as an integer"
msgstr
""
#:
../../library/email.headerregistry.rst:264
msgid
""
"MIME headers all start with the prefix 'Content-'. Each specific header has "
"a certain value, described under the class for that header. Some can also "
"take a list of supplemental parameters, which have a common format. This "
"class serves as a base for all the MIME headers that take parameters."
msgstr
""
#:
../../library/email.headerregistry.rst:271
msgid
"A dictionary mapping parameter names to parameter values."
msgstr
""
#:
../../library/email.headerregistry.rst:276
msgid
""
"A :class:`ParameterizedMIMEHeader` class that handles the :mailheader:"
"`Content-Type` header."
msgstr
""
#:
../../library/email.headerregistry.rst:281
msgid
"The content type string, in the form ``maintype/subtype``."
msgstr
""
#:
../../library/email.headerregistry.rst:290
msgid
""
"A :class:`ParameterizedMIMEHeader` class that handles the :mailheader:"
"`Content-Disposition` header."
msgstr
""
#:
../../library/email.headerregistry.rst:295
msgid
"``inline`` and ``attachment`` are the only valid values in common use."
msgstr
""
#:
../../library/email.headerregistry.rst:300
msgid
"Handles the :mailheader:`Content-Transfer-Encoding` header."
msgstr
""
#:
../../library/email.headerregistry.rst:304
msgid
""
"Valid values are ``7bit``, ``8bit``, ``base64``, and ``quoted-printable``. "
"See :rfc:`2045` for more information."
msgstr
""
#:
../../library/email.headerregistry.rst:313
msgid
""
"This is the factory used by :class:`~email.policy.EmailPolicy` by default. "
"``HeaderRegistry`` builds the class used to create a header instance "
"dynamically, using *base_class* and a specialized class retrieved from a "
"registry that it holds. When a given header name does not appear in the "
"registry, the class specified by *default_class* is used as the specialized "
"class. When *use_default_map* is ``True`` (the default), the standard "
"mapping of header names to classes is copied in to the registry during "
"initialization. *base_class* is always the last class in the generated "
"class's :class:`~type.__bases__` list."
msgstr
""
#:
../../library/email.headerregistry.rst:323
msgid
"The default mappings are:"
msgstr
""
#:
../../library/email.headerregistry.rst:0
msgid
"subject"
msgstr
"subject"
#:
../../library/email.headerregistry.rst:325
msgid
"UniqueUnstructuredHeader"
msgstr
"UniqueUnstructuredHeader"
#:
../../library/email.headerregistry.rst:0
msgid
"date"
msgstr
"date"
#:
../../library/email.headerregistry.rst:326
#:
../../library/email.headerregistry.rst:328
msgid
"UniqueDateHeader"
msgstr
"UniqueDateHeader"
#:
../../library/email.headerregistry.rst:0
msgid
"resent-date"
msgstr
"resent-date"
#:
../../library/email.headerregistry.rst:327
msgid
"DateHeader"
msgstr
"DateHeader"
#:
../../library/email.headerregistry.rst:0
msgid
"orig-date"
msgstr
"orig-date"
#:
../../library/email.headerregistry.rst:0
msgid
"sender"
msgstr
"sender"
#:
../../library/email.headerregistry.rst:329
msgid
"UniqueSingleAddressHeader"
msgstr
"UniqueSingleAddressHeader"
#:
../../library/email.headerregistry.rst:0
msgid
"resent-sender"
msgstr
"resent-sender"
#:
../../library/email.headerregistry.rst:330
msgid
"SingleAddressHeader"
msgstr
"SingleAddressHeader"
#:
../../library/email.headerregistry.rst:0
msgid
"to"
msgstr
"to"
#:
../../library/email.headerregistry.rst:331
#:
../../library/email.headerregistry.rst:333
#:
../../library/email.headerregistry.rst:335
#:
../../library/email.headerregistry.rst:337
#:
../../library/email.headerregistry.rst:339
msgid
"UniqueAddressHeader"
msgstr
"UniqueAddressHeader"
#:
../../library/email.headerregistry.rst:0
msgid
"resent-to"
msgstr
"resent-to"
#:
../../library/email.headerregistry.rst:332
#:
../../library/email.headerregistry.rst:334
#:
../../library/email.headerregistry.rst:336
#:
../../library/email.headerregistry.rst:338
msgid
"AddressHeader"
msgstr
"AddressHeader"
#:
../../library/email.headerregistry.rst:0
msgid
"cc"
msgstr
"cc"
#:
../../library/email.headerregistry.rst:0
msgid
"resent-cc"
msgstr
"resent-cc"
#:
../../library/email.headerregistry.rst:0
msgid
"bcc"
msgstr
"bcc"
#:
../../library/email.headerregistry.rst:0
msgid
"resent-bcc"
msgstr
"resent-bcc"
#:
../../library/email.headerregistry.rst:0
msgid
"from"
msgstr
"from"
#:
../../library/email.headerregistry.rst:0
msgid
"resent-from"
msgstr
"resent-from"
#:
../../library/email.headerregistry.rst:0
msgid
"reply-to"
msgstr
"reply-to"
#:
../../library/email.headerregistry.rst:0
msgid
"mime-version"
msgstr
"mime-version"
#:
../../library/email.headerregistry.rst:340
msgid
"MIMEVersionHeader"
msgstr
"MIMEVersionHeader"
#:
../../library/email.headerregistry.rst:0
msgid
"content-type"
msgstr
"content-type"
#:
../../library/email.headerregistry.rst:341
msgid
"ContentTypeHeader"
msgstr
"ContentTypeHeader"
#:
../../library/email.headerregistry.rst:0
msgid
"content-disposition"
msgstr
"content-disposition"
#:
../../library/email.headerregistry.rst:342
msgid
"ContentDispositionHeader"
msgstr
"ContentDispositionHeader"
#:
../../library/email.headerregistry.rst:0
msgid
"content-transfer-encoding"
msgstr
"content-transfer-encoding"
#:
../../library/email.headerregistry.rst:343
msgid
"ContentTransferEncodingHeader"
msgstr
"ContentTransferEncodingHeader"
#:
../../library/email.headerregistry.rst:0
msgid
"message-id"
msgstr
"message-id"
#:
../../library/email.headerregistry.rst:344
msgid
"MessageIDHeader"
msgstr
"MessageIDHeader"
#:
../../library/email.headerregistry.rst:346
msgid
"``HeaderRegistry`` has the following methods:"
msgstr
"``HeaderRegistry`` 有以下方法："
#:
../../library/email.headerregistry.rst:351
msgid
""
"*name* is the name of the header to be mapped. It will be converted to "
"lower case in the registry. *cls* is the specialized class to be used, "
"along with *base_class*, to create the class used to instantiate headers "
"that match *name*."
msgstr
""
#:
../../library/email.headerregistry.rst:359
msgid
"Construct and return a class to handle creating a *name* header."
msgstr
""
#:
../../library/email.headerregistry.rst:364
msgid
""
"Retrieves the specialized header associated with *name* from the registry "
"(using *default_class* if *name* does not appear in the registry) and "
"composes it with *base_class* to produce a class, calls the constructed "
"class's constructor, passing it the same argument list, and finally returns "
"the class instance created thereby."
msgstr
""
#:
../../library/email.headerregistry.rst:371
msgid
""
"The following classes are the classes used to represent data parsed from "
"structured headers and can, in general, be used by an application program to "
"construct structured values to assign to specific headers."
msgstr
""
#:
../../library/email.headerregistry.rst:378
msgid
""
"The class used to represent an email address. The general form of an "
"address is::"
msgstr
""
#:
../../library/email.headerregistry.rst:381
msgid
"[display_name] <username@domain>"
msgstr
"[display_name] <username@domain>"
#:
../../library/email.headerregistry.rst:383
msgid
"or::"
msgstr
"或是： ::"
#:
../../library/email.headerregistry.rst:385
msgid
"username@domain"
msgstr
"username@domain"
#:
../../library/email.headerregistry.rst:387
msgid
""
"where each part must conform to specific syntax rules spelled out in :rfc:"
"`5322`."
msgstr
""
#:
../../library/email.headerregistry.rst:390
msgid
""
"As a convenience *addr_spec* can be specified instead of *username* and "
"*domain*, in which case *username* and *domain* will be parsed from the "
"*addr_spec*. An *addr_spec* must be a properly RFC quoted string; if it is "
"not ``Address`` will raise an error. Unicode characters are allowed and "
"will be property encoded when serialized. However, per the RFCs, Unicode is "
"*not* allowed in the username portion of the address."
msgstr
""
#:
../../library/email.headerregistry.rst:399
msgid
""
"The display name portion of the address, if any, with all quoting removed. "
"If the address does not have a display name, this attribute will be an empty "
"string."
msgstr
""
#:
../../library/email.headerregistry.rst:405
msgid
"The ``username`` portion of the address, with all quoting removed."
msgstr
""
#:
../../library/email.headerregistry.rst:409
msgid
"The ``domain`` portion of the address."
msgstr
""
#:
../../library/email.headerregistry.rst:413
msgid
""
"The ``username@domain`` portion of the address, correctly quoted for use as "
"a bare address (the second form shown above). This attribute is not mutable."
msgstr
""
#:
../../library/email.headerregistry.rst:419
msgid
""
"The ``str`` value of the object is the address quoted according to :rfc:"
"`5322` rules, but with no Content Transfer Encoding of any non-ASCII "
"characters."
msgstr
""
#:
../../library/email.headerregistry.rst:423
msgid
""
"To support SMTP (:rfc:`5321`), ``Address`` handles one special case: if "
"``username`` and ``domain`` are both the empty string (or ``None``), then "
"the string value of the ``Address`` is ``<>``."
msgstr
""
#:
../../library/email.headerregistry.rst:430
msgid
""
"The class used to represent an address group. The general form of an "
"address group is::"
msgstr
""
#:
../../library/email.headerregistry.rst:433
msgid
"display_name: [address-list];"
msgstr
"display_name: [address-list];"
#:
../../library/email.headerregistry.rst:435
msgid
""
"As a convenience for processing lists of addresses that consist of a mixture "
"of groups and single addresses, a ``Group`` may also be used to represent "
"single addresses that are not part of a group by setting *display_name* to "
"``None`` and providing a list of the single address as *addresses*."
msgstr
""
#:
../../library/email.headerregistry.rst:442
msgid
""
"The ``display_name`` of the group. If it is ``None`` and there is exactly "
"one ``Address`` in ``addresses``, then the ``Group`` represents a single "
"address that is not in a group."
msgstr
""
#:
../../library/email.headerregistry.rst:448
msgid
""
"A possibly empty tuple of :class:`.Address` objects representing the "
"addresses in the group."
msgstr
""
#:
../../library/email.headerregistry.rst:453
msgid
""
"The ``str`` value of a ``Group`` is formatted according to :rfc:`5322`, but "
"with no Content Transfer Encoding of any non-ASCII characters. If "
"``display_name`` is none and there is a single ``Address`` in the "
"``addresses`` list, the ``str`` value will be the same as the ``str`` of "
"that single ``Address``."
msgstr
""
#:
../../library/email.headerregistry.rst:461
msgid
"Footnotes"
msgstr
"註解"
#:
../../library/email.headerregistry.rst:462
msgid
""
"Originally added in 3.3 as a :term:`provisional module <provisional package>`"
msgstr
""
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