Use pip installer for Python 3.7

builder/image-software.sh

@@ -122,7 +122,7 @@ sed -i "s/updates_available//" /usr/share/byobu/status/status
 # sed -i "s/updates_available//" /home/pi/.byobu/status
 
 echo_stamp "Installing pip"
-curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
+curl https://bootstrap.pypa.io/pip/3.7/get-pip.py -o get-pip.py
 curl https://bootstrap.pypa.io/pip/2.7/get-pip.py -o get-pip2.py
 python3 get-pip.py
 python get-pip2.py