How to unpack xz file with python which contains only data but no filename?
17,397
The tarfile
module is only for... err... tar files. What you have here is not one.
XZ support is available in Python 3.3's LZMA module. In Python 2.x, you need backports.lzma
.
try:
import lzma
except ImportError:
from backports import lzma
print lzma.open('file.xz').read()
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Author by
MiB_Coder
Updated on June 04, 2022Comments
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MiB_Coder almost 2 years
I have a file, which I can decompress under linux using the following command:
unxz < file.xz > file.txt
How can I do the same using python? If I use python3 and the tarfile module and do the following:
import sys import tarfile try: with tarfile.open('temp.xz', 'r:xz') as t: t.extract() except Exception as e: print("Error:", e.strerror)
I get the exception: ReadError('invalid header',). So apparently it expects some file- or directory information which is not present in the xz file.
So how can I decompress a file without header information?
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Pete almost 7 yearsthis gives me the data in binary format. is there a quick way to decompress a whole file? for example, I have a file "test.txt.xz" and need a command to get "test.txt". one way is to convert the data in binary format to utf-8 using this way:
binary_data_buffer = lzma.open('test.txt.xz').read()
, thenstring_buffer = binary_data_buffer.decode('utf-8')
and finally write it to a file. but I'm pretty sure there is a more elegant way to do this. -
Charles Duffy almost 7 years@Pete,
lzma.open('test.txt.xz').read().decode('utf-8')
is too much of a mouthful? That said, you can passlzma.open('test.txt.xz', mode='rt', encoding='utf-8')
to get multi-byte character decoding out-of-the-box.