The code should be completely python3 compatible, and in fact many of the distributions are running Certbot (and this) using python3 already.

Thanks for you kind words. It's really encouraging to hear that the project is of use for others as well :)

Also thanks a lot for pointing out the README mention, I had completely forgotten about that, and wonder why I added it in the first place! The scripts are working and tested in Python3 as well. I fixed it in #16

Just ended up here because the Ubuntu upgrade broke my DNS Challenge since "pythton-requests" for Python 2.7 has been removed and is a dependency.

I found a workaround but its very hacky...I hope there is an update to this soon.
Workaround: move 'sys' import up a line, add in a new path before importing 'requests'...probably will blow up some time though.

import sys
sys.path.append('/usr/lib/python3/dist-packages')
import requests

@mmiller7 python-requests is just the ubuntu packaging of the requests package from PyPi. You can install requests for the active Python as such:

pip install requests

Depending on your operating system and environment, the active pip might be for any random installed version of Python2 or Python3. Just figure out which version of Python is invoked by Certbot/this script, and there should be a pip binary for it. Then use the fullpath to pip, which might be something like:

/usr/local/python-versions/python/3.7/bin/pip install requests
/home/user/certbot-virtualenv/bin/pip install requests

alternatively, the python3 version of requests from Ubuntu is available via apt get python3-requests

I wrote my own acme-dns-client for Python 3.5+ that works with certbot and acme.sh.
Additional modules like requests and dnspython are handled via virtual environment.
Please have a look here: https://github.com/maddes-b/acme-dns-client-2
Feedback welcome.