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#: ../Doc/library/zlib.rst:2
msgid ":mod:`zlib` --- Compression compatible with :program:`gzip`"
msgstr ""

#: ../Doc/library/zlib.rst:10
msgid ""
"For applications that require data compression, the functions in this module "
"allow compression and decompression, using the zlib library. The zlib "
"library has its own home page at http://www.zlib.net.   There are known "
"incompatibilities between the Python module and versions of the zlib library "
"earlier than 1.1.3; 1.1.3 has a security vulnerability, so we recommend "
"using 1.1.4 or later."
msgstr ""

#: ../Doc/library/zlib.rst:17
msgid ""
"zlib's functions have many options and often need to be used in a particular "
"order.  This documentation doesn't attempt to cover all of the permutations; "
"consult the zlib manual at http://www.zlib.net/manual.html for authoritative "
"information."
msgstr ""

#: ../Doc/library/zlib.rst:22
msgid "For reading and writing ``.gz`` files see the :mod:`gzip` module."
msgstr ""

#: ../Doc/library/zlib.rst:24
msgid "The available exception and functions in this module are:"
msgstr ""

#: ../Doc/library/zlib.rst:29
msgid "Exception raised on compression and decompression errors."
msgstr ""

#: ../Doc/library/zlib.rst:34
msgid ""
"Computes an Adler-32 checksum of *data*.  (An Adler-32 checksum is almost as "
"reliable as a CRC32 but can be computed much more quickly.)  The result is "
"an unsigned 32-bit integer.  If *value* is present, it is used as the "
"starting value of the checksum; otherwise, a default value of 1 is used.  "
"Passing in *value* allows computing a running checksum over the "
"concatenation of several inputs.  The algorithm is not cryptographically "
"strong, and should not be used for authentication or digital signatures.  "
"Since the algorithm is designed for use as a checksum algorithm, it is not "
"suitable for use as a general hash algorithm."
msgstr ""

#: ../Doc/library/zlib.rst:44
msgid ""
"Always returns an unsigned value. To generate the same numeric value across "
"all Python versions and platforms, use ``adler32(data) & 0xffffffff``."
msgstr ""

#: ../Doc/library/zlib.rst:52
msgid ""
"Compresses the bytes in *data*, returning a bytes object containing "
"compressed data. *level* is an integer from ``0`` to ``9`` or ``-1`` "
"controlling the level of compression; ``1`` is fastest and produces the "
"least compression, ``9`` is slowest and produces the most.  ``0`` is no "
"compression.  The default value is ``-1`` (Z_DEFAULT_COMPRESSION).  "
"Z_DEFAULT_COMPRESSION represents a default compromise between speed and "
"compression (currently equivalent to level 6). Raises the :exc:`error` "
"exception if any error occurs."
msgstr ""

#: ../Doc/library/zlib.rst:60
msgid "*level* can now be used as a keyword parameter."
msgstr ""

#: ../Doc/library/zlib.rst:66
msgid ""
"Returns a compression object, to be used for compressing data streams that "
"won't fit into memory at once."
msgstr ""

#: ../Doc/library/zlib.rst:69
msgid ""
"*level* is the compression level -- an integer from ``0`` to ``9`` or "
"``-1``. A value of ``1`` is fastest and produces the least compression, "
"while a value of ``9`` is slowest and produces the most. ``0`` is no "
"compression. The default value is ``-1`` (Z_DEFAULT_COMPRESSION). "
"Z_DEFAULT_COMPRESSION represents a default compromise between speed and "
"compression (currently equivalent to level 6)."
msgstr ""

#: ../Doc/library/zlib.rst:75
msgid ""
"*method* is the compression algorithm. Currently, the only supported value "
"is ``DEFLATED``."
msgstr ""

#: ../Doc/library/zlib.rst:78
msgid ""
"The *wbits* argument controls the size of the history buffer (or the "
"\"window size\") used when compressing data, and whether a header and "
"trailer is included in the output.  It can take several ranges of values:"
msgstr ""

#: ../Doc/library/zlib.rst:82
msgid ""
"+9 to +15: The base-two logarithm of the window size, which therefore ranges "
"between 512 and 32768.  Larger values produce better compression at the "
"expense of greater memory usage.  The resulting output will include a zlib-"
"specific header and trailer."
msgstr ""

#: ../Doc/library/zlib.rst:87
msgid ""
"−9 to −15: Uses the absolute value of *wbits* as the window size logarithm, "
"while producing a raw output stream with no header or trailing checksum."
msgstr ""

#: ../Doc/library/zlib.rst:91
msgid ""
"+25 to +31 = 16 + (9 to 15): Uses the low 4 bits of the value as the window "
"size logarithm, while including a basic :program:`gzip` header and trailing "
"checksum in the output."
msgstr ""

#: ../Doc/library/zlib.rst:95
msgid ""
"The *memLevel* argument controls the amount of memory used for the internal "
"compression state. Valid values range from ``1`` to ``9``. Higher values use "
"more memory, but are faster and produce smaller output."
msgstr ""

#: ../Doc/library/zlib.rst:99
msgid ""
"*strategy* is used to tune the compression algorithm. Possible values are "
"``Z_DEFAULT_STRATEGY``, ``Z_FILTERED``, and ``Z_HUFFMAN_ONLY``."
msgstr ""

#: ../Doc/library/zlib.rst:102
msgid ""
"*zdict* is a predefined compression dictionary. This is a sequence of bytes "
"(such as a :class:`bytes` object) containing subsequences that are expected "
"to occur frequently in the data that is to be compressed. Those subsequences "
"that are expected to be most common should come at the end of the dictionary."
msgstr ""

#: ../Doc/library/zlib.rst:107
msgid "Added the *zdict* parameter and keyword argument support."
msgstr ""

#: ../Doc/library/zlib.rst:117
msgid ""
"Computes a CRC (Cyclic Redundancy Check) checksum of *data*. The result is "
"an unsigned 32-bit integer. If *value* is present, it is used as the "
"starting value of the checksum; otherwise, a default value of 0 is used.  "
"Passing in *value* allows computing a running checksum over the "
"concatenation of several inputs.  The algorithm is not cryptographically "
"strong, and should not be used for authentication or digital signatures.  "
"Since the algorithm is designed for use as a checksum algorithm, it is not "
"suitable for use as a general hash algorithm."
msgstr ""

#: ../Doc/library/zlib.rst:126
msgid ""
"Always returns an unsigned value. To generate the same numeric value across "
"all Python versions and platforms, use ``crc32(data) & 0xffffffff``."
msgstr ""

#: ../Doc/library/zlib.rst:134
msgid ""
"Decompresses the bytes in *data*, returning a bytes object containing the "
"uncompressed data.  The *wbits* parameter depends on the format of *data*, "
"and is discussed further below. If *bufsize* is given, it is used as the "
"initial size of the output buffer.  Raises the :exc:`error` exception if any "
"error occurs."
msgstr ""

#: ../Doc/library/zlib.rst:142
msgid ""
"The *wbits* parameter controls the size of the history buffer (or \"window "
"size\"), and what header and trailer format is expected. It is similar to "
"the parameter for :func:`compressobj`, but accepts more ranges of values:"
msgstr ""

#: ../Doc/library/zlib.rst:147
msgid ""
"+8 to +15: The base-two logarithm of the window size.  The input must "
"include a zlib header and trailer."
msgstr ""

#: ../Doc/library/zlib.rst:150
msgid ""
"0: Automatically determine the window size from the zlib header. Only "
"supported since zlib 1.2.3.5."
msgstr ""

#: ../Doc/library/zlib.rst:153
msgid ""
"−8 to −15: Uses the absolute value of *wbits* as the window size logarithm.  "
"The input must be a raw stream with no header or trailer."
msgstr ""

#: ../Doc/library/zlib.rst:156
msgid ""
"+24 to +31 = 16 + (8 to 15): Uses the low 4 bits of the value as the window "
"size logarithm.  The input must include a gzip header and trailer."
msgstr ""

#: ../Doc/library/zlib.rst:160
msgid ""
"+40 to +47 = 32 + (8 to 15): Uses the low 4 bits of the value as the window "
"size logarithm, and automatically accepts either the zlib or gzip format."
msgstr ""

#: ../Doc/library/zlib.rst:164
msgid ""
"When decompressing a stream, the window size must not be smaller than the "
"size originally used to compress the stream; using a too-small value may "
"result in an :exc:`error` exception. The default *wbits* value corresponds "
"to the largest window size and requires a zlib header and trailer to be "
"included."
msgstr ""

#: ../Doc/library/zlib.rst:170
msgid ""
"*bufsize* is the initial size of the buffer used to hold decompressed data.  "
"If more space is required, the buffer size will be increased as needed, so "
"you don't have to get this value exactly right; tuning it will only save a "
"few calls to :c:func:`malloc`."
msgstr ""

#: ../Doc/library/zlib.rst:175
msgid "*wbits* and *bufsize* can be used as keyword arguments."
msgstr ""

#: ../Doc/library/zlib.rst:180
msgid ""
"Returns a decompression object, to be used for decompressing data streams "
"that won't fit into memory at once."
msgstr ""

#: ../Doc/library/zlib.rst:183
msgid ""
"The *wbits* parameter controls the size of the history buffer (or the "
"\"window size\"), and what header and trailer format is expected.  It has "
"the same meaning as `described for decompress() <#decompress-wbits>`__."
msgstr ""

#: ../Doc/library/zlib.rst:187
msgid ""
"The *zdict* parameter specifies a predefined compression dictionary. If "
"provided, this must be the same dictionary as was used by the compressor "
"that produced the data that is to be decompressed."
msgstr ""

#: ../Doc/library/zlib.rst:193
msgid ""
"If *zdict* is a mutable object (such as a :class:`bytearray`), you must not "
"modify its contents between the call to :func:`decompressobj` and the first "
"call to the decompressor's ``decompress()`` method."
msgstr ""

#: ../Doc/library/zlib.rst:197
msgid "Added the *zdict* parameter."
msgstr ""

#: ../Doc/library/zlib.rst:201
msgid "Compression objects support the following methods:"
msgstr ""

#: ../Doc/library/zlib.rst:206
msgid ""
"Compress *data*, returning a bytes object containing compressed data for at "
"least part of the data in *data*.  This data should be concatenated to the "
"output produced by any preceding calls to the :meth:`compress` method.  Some "
"input may be kept in internal buffers for later processing."
msgstr ""

#: ../Doc/library/zlib.rst:214
msgid ""
"All pending input is processed, and a bytes object containing the remaining "
"compressed output is returned.  *mode* can be selected from the constants :"
"const:`Z_SYNC_FLUSH`,  :const:`Z_FULL_FLUSH`,  or  :const:`Z_FINISH`, "
"defaulting to :const:`Z_FINISH`.  :const:`Z_SYNC_FLUSH` and :const:"
"`Z_FULL_FLUSH` allow compressing further bytestrings of data, while :const:"
"`Z_FINISH` finishes the compressed stream and  prevents compressing any more "
"data.  After calling :meth:`flush` with *mode* set to :const:`Z_FINISH`, "
"the :meth:`compress` method cannot be called again; the only realistic "
"action is to delete the object."
msgstr ""

#: ../Doc/library/zlib.rst:227
msgid ""
"Returns a copy of the compression object.  This can be used to efficiently "
"compress a set of data that share a common initial prefix."
msgstr ""

#: ../Doc/library/zlib.rst:231
msgid "Decompression objects support the following methods and attributes:"
msgstr ""

#: ../Doc/library/zlib.rst:236
msgid ""
"A bytes object which contains any bytes past the end of the compressed data. "
"That is, this remains ``b\"\"`` until the last byte that contains "
"compression data is available.  If the whole bytestring turned out to "
"contain compressed data, this is ``b\"\"``, an empty bytes object."
msgstr ""

#: ../Doc/library/zlib.rst:244
msgid ""
"A bytes object that contains any data that was not consumed by the last :"
"meth:`decompress` call because it exceeded the limit for the uncompressed "
"data buffer.  This data has not yet been seen by the zlib machinery, so you "
"must feed it (possibly with further data concatenated to it) back to a "
"subsequent :meth:`decompress` method call in order to get correct output."
msgstr ""

#: ../Doc/library/zlib.rst:253
msgid ""
"A boolean indicating whether the end of the compressed data stream has been "
"reached."
msgstr ""

#: ../Doc/library/zlib.rst:256
msgid ""
"This makes it possible to distinguish between a properly-formed compressed "
"stream, and an incomplete or truncated one."
msgstr ""

#: ../Doc/library/zlib.rst:264
msgid ""
"Decompress *data*, returning a bytes object containing the uncompressed data "
"corresponding to at least part of the data in *string*.  This data should be "
"concatenated to the output produced by any preceding calls to the :meth:"
"`decompress` method.  Some of the input data may be preserved in internal "
"buffers for later processing."
msgstr ""

#: ../Doc/library/zlib.rst:270
msgid ""
"If the optional parameter *max_length* is non-zero then the return value "
"will be no longer than *max_length*. This may mean that not all of the "
"compressed input can be processed; and unconsumed data will be stored in the "
"attribute :attr:`unconsumed_tail`. This bytestring must be passed to a "
"subsequent call to :meth:`decompress` if decompression is to continue.  If "
"*max_length* is zero then the whole input is decompressed, and :attr:"
"`unconsumed_tail` is empty."
msgstr ""

#: ../Doc/library/zlib.rst:277
msgid "*max_length* can be used as a keyword argument."
msgstr ""

#: ../Doc/library/zlib.rst:283
msgid ""
"All pending input is processed, and a bytes object containing the remaining "
"uncompressed output is returned.  After calling :meth:`flush`, the :meth:"
"`decompress` method cannot be called again; the only realistic action is to "
"delete the object."
msgstr ""

#: ../Doc/library/zlib.rst:288
msgid ""
"The optional parameter *length* sets the initial size of the output buffer."
msgstr ""

#: ../Doc/library/zlib.rst:293
msgid ""
"Returns a copy of the decompression object.  This can be used to save the "
"state of the decompressor midway through the data stream in order to speed "
"up random seeks into the stream at a future point."
msgstr ""

#: ../Doc/library/zlib.rst:298
msgid ""
"Information about the version of the zlib library in use is available "
"through the following constants:"
msgstr ""

#: ../Doc/library/zlib.rst:304
msgid ""
"The version string of the zlib library that was used for building the "
"module. This may be different from the zlib library actually used at "
"runtime, which is available as :const:`ZLIB_RUNTIME_VERSION`."
msgstr ""

#: ../Doc/library/zlib.rst:311
msgid ""
"The version string of the zlib library actually loaded by the interpreter."
msgstr ""

#: ../Doc/library/zlib.rst:319
msgid "Module :mod:`gzip`"
msgstr ""

#: ../Doc/library/zlib.rst:319
msgid "Reading and writing :program:`gzip`\\ -format files."
msgstr ""

#: ../Doc/library/zlib.rst:322
msgid "http://www.zlib.net"
msgstr ""

#: ../Doc/library/zlib.rst:322
msgid "The zlib library home page."
msgstr ""

#: ../Doc/library/zlib.rst:325
msgid "http://www.zlib.net/manual.html"
msgstr ""

#: ../Doc/library/zlib.rst:325
msgid ""
"The zlib manual explains  the semantics and usage of the library's many "
"functions."
msgstr ""
