Daniel your update builds and runs fine for me on amd64. Two notes though:
Current version is now 3.7.1, I tested and same patches apply to this version. Second is if we have side by side installs then /usr/local/bin/python3 should be a symlink to the users preferred version. Not owned by a package, same for pip. We can likely solve this by a post install message for the user. Thank you for the work on this.
