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bz2.cpython-310.pyc
o iG. @ s d Z g dZdZddlmZ ddlZddlZddlZddl m Z m Z dZ dZ dZG d d d ejZ dd dZdddZdd ZdS )zInterface to the libbzip2 compression library. This module provides a file interface, classes for incremental (de)compression, and functions for one-shot (de)compression. )BZ2File BZ2CompressorBZ2Decompressoropencompress decompressz%Nadeem Vawda <nadeem.vawda@gmail.com> )r N)r r c @ s e Zd ZdZd*ddddZdd Zed d Zd d Zd d Z dd Z dd Z d+ddZ d,ddZ d,ddZdd Zd,d d Zd,d d Zd!d" Zd#d$ Zejfd%d&Zd'd( Zd)S )-r a@ A file object providing transparent bzip2 (de)compression. A BZ2File can act as a wrapper for an existing file object, or refer directly to a named file on disk. Note that BZ2File provides a *binary* file interface - data read is returned as bytes, and data to be written should be given as bytes. r compresslevelc C s6 d| _ d| _t| _d| krdkstd td|dv r$d}t}n1|dv r2d }t}t|| _n#|d v r@d }t}t|| _n|d v rNd }t}t|| _ntd|f t |t t t j frkt||| _ d| _|| _nt|dsut|dr||| _ || _ntd| jtkrtj| j ttd}t|| _dS d| _dS )a Open a bzip2-compressed file. If filename is a str, bytes, or PathLike object, it gives the name of the file to be opened. Otherwise, it should be a file object, which will be used to read or write the compressed data. mode can be 'r' for reading (default), 'w' for (over)writing, 'x' for creating exclusively, or 'a' for appending. These can equivalently be given as 'rb', 'wb', 'xb', and 'ab'. If mode is 'w', 'x' or 'a', compresslevel can be a number between 1 and 9 specifying the level of compression: 1 produces the least compression, and 9 (default) produces the most compression. If mode is 'r', the input file may be the concatenation of multiple compressed streams. NFr r z%compresslevel must be between 1 and 9) r rbr )wwbr )xxbr )aabr Invalid mode: %rTreadwritez6filename must be a str, bytes, file or PathLike object)trailing_errorr )_fp_closefp _MODE_CLOSED_mode ValueError _MODE_READ _MODE_WRITEr _compressor isinstancestrbytesosPathLike _builtin_openhasattr TypeError _compressionDecompressReaderr OSErrorioBufferedReader_buffer_pos)selffilenamemoder mode_coderaw r6 /usr/lib/python3.10/bz2.py__init__% sJ zBZ2File.__init__c C s | j tkrdS zQ| j tkr| j n| j tkr$| j| j d| _W z&| j r=| j W d| _d| _ t| _ d| _dS W d| _d| _ t| _ d| _dS d| _d| _ t| _ d| _w z$| j rp| j W d| _d| _ t| _ d| _w W d| _d| _ t| _ d| _w d| _d| _ t| _ d| _w )zFlush and close the file. May be called more than once without error. Once the file is closed, any other operation on it will raise a ValueError. NF) r r r r/ closer r r r! flushr r1 r6 r6 r7 r9 a sR z BZ2File.closec C s | j tkS )z True if this file is closed.)r r r; r6 r6 r7 closedy s zBZ2File.closedc C s | | j S )z3Return the file descriptor for the underlying file.)_check_not_closedr filenor; r6 r6 r7 r> ~ zBZ2File.filenoc C s | o| j S )z)Return whether the file supports seeking.)readabler/ seekabler; r6 r6 r7 rA s zBZ2File.seekablec C | | jtkS )z/Return whether the file was opened for reading.)r= r r r; r6 r6 r7 r@ r? zBZ2File.readablec C rB )z/Return whether the file was opened for writing.)r= r r r; r6 r6 r7 writable r? zBZ2File.writabler c C | | j|S )zReturn buffered data without advancing the file position. Always returns at least one byte of data, unless at EOF. The exact number of bytes returned is unspecified. )_check_can_readr/ peek)r1 nr6 r6 r7 rF s z BZ2File.peekc C rD )zRead up to size uncompressed bytes from the file. If size is negative or omitted, read until EOF is reached. Returns b'' if the file is already at EOF. )rE r/ r r1 sizer6 r6 r7 r s z BZ2File.readc C s" | |dk r tj}| j|S )zRead up to size uncompressed bytes, while trying to avoid making multiple reads from the underlying stream. Reads up to a buffer's worth of data if size is negative. Returns b'' if the file is at EOF. r )rE r- DEFAULT_BUFFER_SIZEr/ read1rI r6 r6 r7 rL s z BZ2File.read1c C rD )zRRead bytes into b. Returns the number of bytes read (0 for EOF). )rE r/ readinto)r1 br6 r6 r7 rM s zBZ2File.readintoc C 8 t |tst|dstd| }| | j|S )a Read a line of uncompressed bytes from the file. The terminating newline (if present) is retained. If size is non-negative, no more than size bytes will be read (in which case the line may be incomplete). Returns b'' if already at EOF. __index__Integer argument expected)r" intr( r) rP rE r/ readlinerI r6 r6 r7 rS zBZ2File.readlinec C rO )zRead a list of lines of uncompressed bytes from the file. size can be specified to control the number of lines read: no further lines will be read once the total size of the lines read so far equals or exceeds size. rP rQ )r" rR r( r) rP rE r/ readlinesrI r6 r6 r7 rU rT zBZ2File.readlinesc C sX | t|ttfrt|}nt|}|j}| j|}| j | | j |7 _ |S )a Write a byte string to the file. Returns the number of uncompressed bytes written, which is always the length of data in bytes. Note that due to buffering, the file on disk may not reflect the data written until close() is called. ) _check_can_writer" r$ bytearraylen memoryviewnbytesr! r r r r0 )r1 datalength compressedr6 r6 r7 r s z BZ2File.writec C s t j| |S )zWrite a sequence of byte strings to the file. Returns the number of uncompressed bytes written. seq can be any iterable yielding byte strings. Line separators are not added between the written byte strings. )r* BaseStream writelines)r1 seqr6 r6 r7 r_ s zBZ2File.writelinesc C s | | j||S )a Change the file position. The new position is specified by offset, relative to the position indicated by whence. Values for whence are: 0: start of stream (default); offset must not be negative 1: current stream position 2: end of stream; offset must not be positive Returns the new file position. Note that seeking is emulated, so depending on the parameters, this operation may be extremely slow. )_check_can_seekr/ seek)r1 offsetwhencer6 r6 r7 rb s z BZ2File.seekc C s" | | jtkr| j S | jS )z!Return the current file position.)r= r r r/ tellr0 r; r6 r6 r7 re s z BZ2File.tellN)r )r )rH )__name__ __module__ __qualname____doc__r8 r9 propertyr< r> rA r@ rC rF r rL rM rS rU r r_ r- SEEK_SETrb re r6 r6 r6 r7 r s( < r r r c C s d|v rd|v rt d|f n|durt d|dur t d|dur(t d|dd}t| ||d }d|v rFt|}t||||S |S ) a Open a bzip2-compressed file in binary or text mode. The filename argument can be an actual filename (a str, bytes, or PathLike object), or an existing file object to read from or write to. The mode argument can be "r", "rb", "w", "wb", "x", "xb", "a" or "ab" for binary mode, or "rt", "wt", "xt" 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 BZ2File constructor: BZ2File(filename, mode, compresslevel). In this case, the encoding, errors and newline arguments must not be provided. For text mode, a BZ2File object is created, and wrapped in an io.TextIOWrapper instance with the specified encoding, error handling behavior, and line ending(s). trN r Nz0Argument 'encoding' not supported in binary modez.Argument 'errors' not supported in binary modez/Argument 'newline' not supported in binary moder r )r replacer r- text_encoding TextIOWrapper)r2 r3 r encodingerrorsnewlinebz_mode binary_filer6 r6 r7 r s r c C s t |}|| | S )zCompress a block of data. compresslevel, if given, must be a number between 1 and 9. For incremental compression, use a BZ2Compressor object instead. )r r r: )r[ r compr6 r6 r7 r 9 s r c C sb g }| r,t }z|| }W n ty |rY n w || |js'td|j} | sd|S )zjDecompress a block of data. For incremental decompression, use a BZ2Decompressor object instead. zACompressed data ended before the end-of-stream marker was reached )r r r, appendeofr unused_datajoin)r[ resultsdecompresr6 r6 r7 r D s r )r r NNN)r )ri __all__ __author__builtinsr r' r- r% r* _bz2r r r r r r^ r r r r6 r6 r6 r7 <module> s$ v *