Thank you John, I think I figured out the way. My case is a little bit rare as I'm dealing with the HDF5 file format, I can not think of any way to retrieve the entire in memory file as a single python object and then serialize it. What I did is to use the hdf5.get_file_image function to get a memory image of the file, and then use, io.ByteIO(image) to make it a file-like object.
So far, it works well, but I believe it is not the best way in terms of performance. Best, Jialin On Thu, Oct 5, 2017 at 8:25 AM, John Dickinson <m...@not.mn> wrote: > If you've got an arbitrary object in Python, you'll need to serialize it > to a file-like object. You could keep it in memory and use a StringIO > type, or you could serialize it to disk and open() it like any other file. > > Ultimately, Swift is storing arbitrary bytes and doesn't care what they > are. You, as the Swift client (i.e. API user), need to dump those bytes on > the network to send them to Swift. As long as you're transforming your > Python object[s] in some regular way that makes sense in your application, > it doesn't matter what bytes you send to Swift. > > --John > > On 5 Oct 2017, at 8:07, Jialin Liu wrote: > > Hi, > It seems to me that openstack swift only supports file upload/download, is > it possible to put a python object to swift store? > The doc says we could use file-like object, e.g., StringIO, but this is > very limited. I'd like to write a numpy array or other python object into > the swift store, can anybody tell me the solution? > > Best, > Jialin > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > >
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