Unable to run 'download_reference_data' with 32 bit Python 3

[rhowar23]

After a review of 'requests.get(stream=True) will get incomplete data #4227' by Luckasa, I realized that I needed to 'chunk' the file (this issue is due to running large files with 32 bit Python 3). I made the following change to 'download_reference_data', which resolved the problem:

Changed line 93 from:

open(dest, 'wb').write(r.content)

to:

open(dest, 'wb').write(r.content)

            with open(dest, 'wb') as f:
                for chunk in r.iter_content(chunk_size=1024*36):
                    if chunk:
                        f.write(chunk)
                        f.flush()
            r.close()