Handling of compressed files is offered by the BZ2File class.
|filename[, mode[, buffering[, compresslevel]]])|
'w', for reading (default) or writing. When opened for writing, the file will be created if it doesn't exist, and truncated otherwise. If buffering is given,
0means unbuffered, and larger numbers specify the buffer size; the default is
0. If compresslevel is given, it must be a number between
9; the default is
9. Add a "U" to mode to open the file for input with universal newline support. Any line ending in the input file will be seen as a "\n" in Python. Also, a file so opened gains the attribute newlines; the value for this attribute is one of
None(no newline read yet),
'\r\n'or a tuple containing all the newline types seen. Universal newlines are available only when reading. Instances support iteration in the same way as normal file instances.
for line in fileinstead.
0(offset from start of file, offset should be
>= 0); other values are
1(move relative to current position, positive or negative), and
2(move relative to end of file, usually negative, although many platforms allow seeking beyond the end of a file).
Note that seeking of bz2 files is emulated, and depending on the parameters the operation may be extremely slow.
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