I'm working on an application that needs to scan files from 3rd parties and process them. Sometimes these are compressed, so I've created a function that checks the file extension (tar.gz, gz, zip) and uncompresses accordingly. Some of the .zip files return this error: NotImplementedError: compression type 12 (bzip2).
Is there a better way for me to identify the the compression type other than the file extension?
Turns out the zipfile module in Python 2.7 doesn't support a later version of PKZIP that has bzip2 support. Switching to Python 3.3 and using zipfile module works fine.
Python zipfile module is implemented in pretty straitforward python source (modifiable). It is quite simple to implement bz2 compression and decompression capabilities when bz2 module is available (~ 7 locations to edit, mostly to rewrite zlib to bz2 compression/decompression calls). Take a look at my take on that, if you need it: https://gist.github.com/zahradil/e1a79a6152209619f046d349576d9de2
