-echo -n "Checking that python bindings version is $VERSION... "
-py_version=`python -c "with open('$PV_FILE') as vf: exec(vf.read()); print(__VERSION__)"`
+printf %s "Checking that python bindings version is $VERSION... "
+py_version=`python3 -c "with open('$PV_FILE') as vf: exec(vf.read()); print(__VERSION__)"`