code: def tarfile_extract(fileobj, dest_path):
          
          # Though this method doesn't fit cleanly into the TarPartition object,
          # tarballs are only ever extracted for partitions so the logic jives
          # for the most part.
          tar = tarfile.open(mode='r|', fileobj=fileobj,
                             bufsize=pipebuf.PIPE_BUF_BYTES)
  
          # canonicalize dest_path so the prefix check below works
          dest_path = os.path.realpath(dest_path)
  
          # list of files that need fsyncing
          extracted_files = []
  
          # Iterate through each member of the tarfile individually. We must
          # approach it this way because we are dealing with a pipe and the
          # getmembers() method will consume it before we extract any data.
          for member in tar:
              assert not member.name.startswith('/')
              relpath = os.path.join(dest_path, member.name)
  
              # Workaround issue with tar handling of symlink, see:
              # https://bugs.python.org/issue12800
              if member.issym():
                  target_path = os.path.join(dest_path, member.name)
                  try:
                      os.symlink(member.linkname, target_path)
                  except OSError as e:
                      if e.errno == errno.EEXIST:
                          os.remove(target_path)
                          os.symlink(member.linkname, target_path)
                      else:
                          raise
                  continue
  
              if member.isreg() and member.size >= pipebuf.PIPE_BUF_BYTES:
                  cat_extract(tar, member, relpath)
              else:
                  tar.extract(member, path=dest_path)
  
              filename = os.path.realpath(relpath)
              extracted_files.append(filename)
  
              # avoid accumulating an unbounded list of strings which
              # could be quite large for a large database
              if len(extracted_files) > 1000:
                  _fsync_files(extracted_files)
                  del extracted_files[:]
          tar.close()
          _fsync_files(extracted_files)
docs: Extract a tarfile described by a file object to a specified path.
  
          Args:
              fileobj (file): File object wrapping the target tarfile.
              dest_path (str): Path to extract the contents of the tarfile to.