utils.py 文件源码

def extract_targz(tarname, filename=None, target_dir='.'):
    """filename must be a valid path in the tar"""
    import tarfile
    tmp_dir = '._tmp_'
    if filename is None:
        tarfile.TarFile.gzopen(tarname).extractall(target_dir)
    else:
        import shutil
        tarfile.TarFile.gzopen(tarname).extractall(tmp_dir)
        shutil.copy2(os.path.join(tmp_dir, filename),
                     os.path.join(target_dir, filename.split(os.path.sep)[-1]))
        shutil.rmtree(tmp_dir)