S3 old object body was not closed after seek()

[inksink]

In class SeekableRawReader:
If we seek(), self._body will be replaced with a new object['Body']:

self._body = self._object.get(Range=range_string)['Body']

But old body should been closed. Why not :

self._body.close()
self._body = self._object.get(Range=range_string)['Body']

[mpenkov]

I think once the function exits, the old body will get garbage-collected and closed then. I don't have anything to back this up.

However, I agree that closing it explicitly is a better idea. May be worth checking for None before the close.

Are you able to make a PR?

[inksink]

OK I will make a PR tomorrow