Using temporary file as backing object for a tarfile

I have existing code that handles a tarball and would like to use that to process a directory, so I thought it would be reasonable to pack the directory up in a temporary file. I ended up writing:

class temp_tarball( object ):
def __init__( self, path ):
self.tmp = tempfile.NamedTemporaryFile()
self.tarfile = tarfile.open( None, 'w:', self.tmp )
self.tarfile.close()
self.tmp.flush()
self.tarfile = tarfile.open( self.tmp.name, 'r:' )
def __del__( self ):
self.tarfile.close()
self.tmp.close()


I am looking for a cleaner way to reopen the tarfile with mode 'r'.

• What's your concern with it now? – Winston Ewert Feb 1 '12 at 15:47
• @winston I don't like using the NamedTemporaryFile, and would prefer to use tempfile.TemporaryFile. I don't really have a specific complaint; it just smells a bit funny as it is. – William Pursell Feb 1 '12 at 16:21

You could try:

def __init__(self, path):
self.tmp = tempfile.TemporaryFile()
self.tarfile = tarfile.open( fileobj=self.tmp, mode='w:' )