I want to use PyLZMA to extract a file from an archive (e.g. test.7z) and extract it to the same directory.
I'm a newbie to Python and have no idea how to start. I've done some googling and found some examples and docs, but I don't understand how they work.
Could someone please post the basic code for what I want to do so that I can start to work and understand?
Here is a Python class to handle the basic functionality. I have used it for my own work:
import py7zlib class SevenZFile(object): @classmethod def is_7zfile(cls, filepath): ''' Class method: determine if file path points to a valid 7z archive. ''' is7z = False fp = None try: fp = open(filepath, 'rb') archive = py7zlib.Archive7z(fp) n = len(archive.getnames()) is7z = True finally: if fp: fp.close() return is7z def __init__(self, filepath): fp = open(filepath, 'rb') self.archive = py7zlib.Archive7z(fp) def extractall(self, path): for name in self.archive.getnames(): outfilename = os.path.join(path, name) outdir = os.path.dirname(outfilename) if not os.path.exists(outdir): os.makedirs(outdir) outfile = open(outfilename, 'wb') outfile.write(self.archive.getmember(name).read()) outfile.close() Here are two code snippets i found here http://www.linuxplanet.org/blogs/?cat=3845
# Compress the input file (as a stream) to a file (as a stream) i = open(source_file, 'rb') o = open(compressed_file, 'wb') i.seek(0) s = pylzma.compressfile(i) while True: tmp = s.read(1) if not tmp: break o.write(tmp) o.close() i.close() # Decomrpess the file (as a stream) to a file (as a stream) i = open(compressed_file, 'rb') o = open(decompressed_file, 'wb') s = pylzma.decompressobj() while True: tmp = i.read(1) if not tmp: break o.write(s.decompress(tmp)) o.close() i.close()