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„ Z d d d „ Z d f d „ ƒ YZ d „ Z e d j o e ƒ n d S( s‘ 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.Nt GzipFilet openi i i i i c C s# | d j o | d d >7} n | S( s‹ Return i as an unsigned integer, assuming it fits in 32 bits.
If it's >= 2GB when viewed as a 32-bit unsigned int, return a long.
i l i N( t i( R ( ( t /usr/lib/python2.4/gzip.pyt U32 s
c C s | d @S( s> Return the low-order 32 bits of an int, as a non-negative int.l ÿÿ N( R ( R ( ( R t LOWU32 s c C s | i t i d | ƒ ƒ d S( Ns <l( t outputt writet structt packt value( R R
( ( R t write32 s c C s | i t i d | ƒ ƒ d S( Ns <L( R R R R R
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( ( R t write32u" s c C s t i d | i d ƒ ƒ d S( Ns <li i ( R t unpackt inputt read( R ( ( R t read32' s t rbi c C s t | | | ƒ S( sŸ Shorthand for GzipFile(filename, mode, compresslevel).
The filename argument is required; mode defaults to 'rb'
and compresslevel defaults to 9.
N( R t filenamet modet
compresslevel( R R R ( ( R R * s c B s t Z d Z e Z d d d Z e e d e d „ Z d „ Z d „ Z d „ Z d „ Z
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„ Z d d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z d d „ Z d d „ Z d „ Z d „ Z d „ Z RS( sˆ The GzipFile class simulates most of the methods of a file object with
the exception of the readinto() and truncate() methods.
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S( sA 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, a StringIO 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'.
Be aware that only the 'rb', 'ab', and 'wb' values should be used
for cross-platform portability.
The compresslevel argument is an integer from 1 to 9 controlling the
level of compression; 1 is fastest and produces the least compression,
and 9 is slowest and produces the most compression. The default is 9.
t bR t namet R i i t rt wt as Mode s not supportedN( R t fileobjt Nonet __builtin__R R t selft myfileobjt hasattrR t READt Truet _new_membert extrabuft extrasizet WRITEt _init_writet zlibt compressobjR t DEFLATEDt MAX_WBITSt
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Ni s ‹s Not a gzipped filei i s Unknown compression methodi i R> ( R R R t magicR. t ordt methodt flagt FEXTRAt xlenRA R" R5 t FCOMMENTt FHCRC( R RF R5 RK RI RH ( ( R t _read_gzip_headerŸ s4
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iÿÿÿÿc C su | i t j o d k } t | i d ƒ ‚ n | i d j o | i d j o d Sn d } | d j oY y6 x/ t o' | i | ƒ t
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| i } q5n X| i | } | i | | _ | i | | _ | i | 7_ | S( Ns$ read() on write-only GzipFile objecti R i i ( R R R! RO R. RP R% R R t readsizeR; R" t _readt mint max_read_chunkt EOFErrorR$ t chunkR/ ( R R; RO RT RY ( ( R R Î s6
c C s? | | i | _ t | ƒ | i | _ | i t | ƒ 8_ d S( N( t bufR R$ RR R% R/ ( R RZ ( ( R t _unreadî s c C sv | i d j o
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t d ‚ n d S( Niøÿÿÿi s CRC check faileds! Incorrect length of data produced( R R R^ R R9 R t isizeR: R. R R; ( R R9 Rg ( ( R Rd + s
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o d Sn X| i ƒ d S( N( R R R R t AttributeErrorRh ( R ( ( R t __del__F s c C s | i i ƒ d S( N( R R Rb ( R ( ( R Rb O s c C s
| i i ƒ S( s¥ Invoke the underlying file object's fileno() method.
This will raise AttributeError if the underlying file object
doesn't support fileno().
N( R R t fileno( R ( ( R Rk R s c C s t S( N( Ra ( R ( ( R t isattyZ s c C s | i S( N( R R/ ( R ( ( R R\ ] s c C sX | i t j o t d ƒ ‚ n | i i d ƒ t | _ d | _ d | _ d | _
d S( s[ Return the uncompressed stream file position indicator to the
beginning of the files Can't rewind in write modei R N( R R R! R. R R^ R" R# R$ R% R/ ( R ( ( R t rewind` s c C sþ | i t j or | | i j o t d ƒ ‚ n | | i } x) t | d ƒ D] } | i d d ƒ qN W| i | d d ƒ ny | i t j oh | | i j o | i
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