import StringIO and pass data through StringIO read

[Keimille]

This resolved the issue for me in production.
Resolves #172

[acjohnson]

Has this been tested with both python 2 and python 3?

[Keimille]

Yes, I've tested on both python2 and 3

[spyder007]

FWIW, when I grabbed the latest code from this repository, I got an error using python 3.11.2

Traceback (most recent call last): File "/home/matt/anaconda3/envs/py_3/bin/grafana-backup", line 5, in <module> from grafana_backup.cli import main File "/home/matt/anaconda3/envs/py_3/lib/python3.11/site-packages/grafana_backup/cli.py", line 3, in <module> from grafana_backup.restore import main as restore File "/home/matt/anaconda3/envs/py_3/lib/python3.11/site-packages/grafana_backup/restore.py", line 15, in <module> from grafana_backup.s3_download import main as s3_download File "/home/matt/anaconda3/envs/py_3/lib/python3.11/site-packages/grafana_backup/s3_download.py", line 3, in <module> import StringIO ModuleNotFoundError: No module named 'StringIO'

I reverted to tag 1.3.0 and the error went away.