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$ˆl–Ãa¾”d*j"TÚ�zã@¸Ø”Å£Ä „šißÃÂÁ0Ÿ"""Interface to the libbzip2 compression library. This module provides a file interface, classes for incremental (de)compression, and functions for one-shot (de)compression. """ __all__ = ["BZ2File", "BZ2Compressor", "BZ2Decompressor", "open", "compress", "decompress"] __author__ = "Nadeem Vawda " from builtins import open as _builtin_open import io import os import _compression from threading import RLock from _bz2 import BZ2Compressor, BZ2Decompressor _MODE_CLOSED = 0 _MODE_READ = 1 # Value 2 no longer used _MODE_WRITE = 3 class BZ2File(_compression.BaseStream): """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. """ def __init__(self, filename, mode="r", *, compresslevel=9): """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. """ # This lock must be recursive, so that BufferedIOBase's # writelines() does not deadlock. self._lock = RLock() self._fp = None self._closefp = False self._mode = _MODE_CLOSED if not (1 <= compresslevel <= 9): raise ValueError("compresslevel must be between 1 and 9") if mode in ("", "r", "rb"): mode = "rb" mode_code = _MODE_READ elif mode in ("w", "wb"): mode = "wb" mode_code = _MODE_WRITE self._compressor = BZ2Compressor(compresslevel) elif mode in ("x", "xb"): mode = "xb" mode_code = _MODE_WRITE self._compressor = BZ2Compressor(compresslevel) elif mode in ("a", "ab"): mode = "ab" mode_code = _MODE_WRITE self._compressor = BZ2Compressor(compresslevel) else: raise ValueError("Invalid mode: %r" % (mode,)) if isinstance(filename, (str, bytes, os.PathLike)): self._fp = _builtin_open(filename, mode) self._closefp = True self._mode = mode_code elif hasattr(filename, "read") or hasattr(filename, "write"): self._fp = filename self._mode = mode_code else: raise TypeError("filename must be a str, bytes, file or PathLike object") if self._mode == _MODE_READ: