For TarArchiveReader and ZipArchiveReader, we attach the archive file stream to each file stream here:

The main reason is preventing archive file stream is closed by gc:
If we deplete the archive reader DataPipe using list(dp), all the file streams within the list are actually closed if we do not attach the archive file stream. And, here is the test to validate it:

As a result, like the tests here:

A warning is raised because we are relying on gc to close the archive stream at the end.

Two options:

• Remove reference of archive stream from each file stream, but somehow still make list(dp) working
• Find a way to eliminate the opened file stream warning in these tests (TODOs)

cc @ssnl @VitalyFedyunin @ejguan