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d d � Z d d � Z d d � Z e d k r>e � n d S( u� Functions that read and write gzipped files.
The user of the file doesn't have to worry about the compression,
but random access is not allowed.i Nu GzipFileu openu compressu
decompressi i i i i u rbi c C s* d | k r1 d | k r� t d | f � � q� nQ | d k rL t d � � n | d k rg t d � � n | d k r� t d � � n | j d d � } t | t t f � r� t | | | � } nB t | d � s� t | d � r� t d | | | � } n t d
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| | | | � S| Sd S( u� Open a gzip-compressed file in binary or text mode.
The filename argument can be an actual filename (a str or bytes object), or
an existing file object to read from or write to.
The mode argument can be "r", "rb", "w", "wb", "a" or "ab" for binary mode,
or "rt", "wt" or "at" for text mode. The default mode is "rb", and the
default compresslevel is 9.
For binary mode, this function is equivalent to the GzipFile constructor:
GzipFile(filename, mode, compresslevel). In this case, the encoding, errors
and newline arguments must not be provided.
For text mode, a GzipFile object is created, and wrapped in an
io.TextIOWrapper instance with the specified encoding, error handling
behavior, and line ending(s).
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d S( u _PaddedFileu� Minimal read-only file object that prepends a string to the contents
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u _PaddedFilec B s� | Ee Z d Z d Z d; Z d= Z d; d; d d; d; d d � Z e d d � � Z d d
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d d � Z d d � Z d d � Z d> d d � Z d? d d � Z d d � Z d d � Z d d d! � Z d" d# � Z d$ d% � Z e d& d' � � Z d( d) � Z e j d* d+ � Z d, d- � Z d. d/ � Z d0 d1 � Z d2 d3 � Z d4 d5 � Z! d6 d7 d8 � Z" d@ d9 d: � Z# d; S(A u GzipFileu The GzipFile class simulates most of the methods of a file object with
the exception of the readinto() and truncate() methods.
This class only supports opening files in binary mode. If you need to open a
compressed file in text mode, use the gzip.open() function.
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C s� | r6 d | k s d | k r6 t d j | � � � n | rU d | k rU | d 7} n | d k r� t j | | ps d � } | _ n | d k r� t | d d � } t | t t f � s� d } q� n | d k r� t | d d � } n | j
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d � r�t | _ | j | � t j | t j t j t j d � | _ n t d j | � � � | | _ d | _ | | _ | j t k r�| j � n d S( uz Constructor for the GzipFile class.
At least one of fileobj and filename must be given a
non-trivial value.
The new class instance is based on fileobj, which can be a regular
file, an io.BytesIO object, or any other object which simulates a file.
It defaults to None, in which case filename is opened to provide
a file object.
When fileobj is not None, the filename argument is only used to be
included in the gzip file header, which may includes the original
filename of the uncompressed file. It defaults to the filename of
fileobj, if discernible; otherwise, it defaults to the empty string,
and in this case the original filename is not included in the header.
The mode argument can be any of 'r', 'rb', 'a', 'ab', 'w', or 'wb',
depending on whether the file will be read or written. The default
is the mode of fileobj if discernible; otherwise, the default is 'rb'.
A mode of 'r' is equivalent to one of 'rb', and similarly for 'w' and
'wb', and 'a' and 'ab'.
The compresslevel argument is an integer from 0 to 9 controlling the
level of compression; 1 is fastest and produces the least compression,
and 9 is slowest and produces the most compression. 0 is no compression
at all. The default is 9.
The mtime argument is an optional numeric timestamp to be written
to the stream when compressing. All gzip compressed streams
are required to contain a timestamp. If omitted or None, the
current time is used. This module ignores the timestamp when
decompressing; however, some programs, such as gunzip, make use
of it. The format of the timestamp is the same as that of the
return value of time.time() and of the st_mtime member of the
object returned by os.stat().
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