Extract all files with directory path in given directory

Question

I have a tar archive in which I have a directory which I need to extract in a given directory. For example: I have a directory

TarPrefix/x/y/z

in a tar archive I want to extract it in a given target directory for example: extracted/a/ this directory should contain all the files and directories contained in directory TarPrefix/x/y/z.

subdir_and_files = [  tarinfo for tarinfo in tar.getmembers()
                      if tarinfo.name.startswith("subfolder/")
                   ]

to get the list of all the members in the directory path "subfolder/" and then I extract it using tar.extractall(extracted/a,subdir_and_files) but it extracts all the members with their directory path For example this results in extracted/a/x/y/z. Could you please help me in extracting these files in the given folder.

I don't know, but this question seems to be sort of the opposite of yours: http://stackoverflow.com/questions/2239655/python-tarfile-adding-files-without-directory-hiearchy Maybe you can use extract() rather than extractall() and see what you can make happen, possibly by modifying the TarInfo objects you got in subdir_and_files? — John Zwinck, Nov 24 '11 at 17:21
Sorry to ask a beginner's question. I am a beginner in python and did not found any answer on google that's why asked such a question. To help others I want to answer this question. You just need to change the tarinfo.name attribute value to the correct value. i.e. in my given example `tarinfo.name=tarinfo.name[len(Tarprefix/x/y/z):]` and then using the same code works. — gaurav, Nov 24 '11 at 17:38
I tried to answer my own question but I am not allowed till eight hours so was waiting till then. — gaurav, Nov 24 '11 at 17:38
I think the answer is not easy, the way how it [tarlib] is done it not good (tarinfo tells about object in archive, not about extracted object). I think it should be better api for extracting stuff (tar command for example has --strip-components parameter) — spinus, Jan 15 '13 at 15:25

score 17 · Accepted Answer · answered Nov 24 '11 at 18:06

Looks like you may have already found an answer, but here's my version anyway:

import sys, tarfile

def get_members(tar, prefix):
    if not prefix.endswith('/'):
        prefix += '/'
    offset = len(prefix)
    for tarinfo in tar.getmembers():
        if tarinfo.name.startswith(prefix):
            tarinfo.name = tarinfo.name[offset:]
            yield tarinfo

args = sys.argv[1:]

if len(args) > 1:
    tar = tarfile.open(args[0])
    path = args[2] if len(args) > 2 else '.'
    tar.extractall(path, get_members(tar, args[1]))

Thanks for helping. Ya I found the answer by experimenting with stuff :). Anyways thanks a lot. — gaurav, Nov 25 '11 at 03:44

score 4 · Answer 2 · answered Dec 01 '17 at 00:17

4

with tarfile.open('sourcefile.tgz', 'r:gz') as _tar:
    for member in _tar:
      if member.isdir():
         continue
      fname = member.name.rsplit('/',1)[1]
      _tar.makefile(member, 'desination_dir' + '/' + fname)

answered Dec 01 '17 at 00:17

Gerrit

41
1

2

describe something about your answer. – Satendra Dec 01 '17 at 05:37

Extract all files with directory path in given directory

2 Answers2

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