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+## Switching to python 3
+
+### Install python3 and related system packages, in Ubuntu 16.04 / Debian:
+
+
+     apt-get install python3-setuptools python3-pip python3-venv \
+      python3-dev python3-pil python3-numpy python3-psycopg2 \
+      python3-pyinotify python3-simplejson python3-lxml \
+      python3-html5lib python3-ox ipython3
+
+### Install python3 virtualenv as pandora user
+
+
+     ./ctl init