"Excellent utility, but if you need A2DP support, you'll want to install a newer version from this PPA: cschramm/blueman. (See comments #29 and #92 on this bug report: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1283003/+index?comments=all )"
"Pip is great for managing your entire python distribution. There is some need for caution; pip keeps packages in a different location than packages installed by apt, so you may sometimes run into unexpected behavior if you have multiple versions of packages. Also, you will need to run different versions of pip if you have both python2 and python3."