Run HA on Pi virtualenv: How to inport PAHO.MQTT under virtualenv?

Hi, I woud like to use PAHO mqtt in HA on Raspberry Pi.

After installing Hassbian, HA is in virtualenv environment. And I use sudo pip3 install paho-mqtt python-etcd to install paho when I deactivate the virtualenv. (Because when I only use pip3 install paho-mqtt python-etcd in virtual environment, permission denied)

Then I found I can only import homeassistant when I develop under virtualenv but I cannot import PAHO. If I deactivate the virtualenv, I can only import PAHO but cannot import homeassisant.

How can I import both homeassistant and PAHO under either virtual or virtual environment??

Thank!

Solved. Just copy paho into HA python3.4 library