GzipFile as a Context manager

[Mikolai Fajer]

Is there a reason that the gzip.GzipFile class does not have __enter__
and __exit__ methods that mimic those of the file object?  I expected
the following to work but it doesn't:

import gzip
with gzip.open('temp.gz', 'w') as fhandle:
    gzip.write('Hello world.')

If there is no reason to avoid this behavior should I submit a bug
report and a subsequent patch?  Thanks!

-- 

     -Mikolai Fajer-