Create a .pythonrc file in HOME directory
<code bash>
import rlcompleter
import readline
readline.parse_and_bind("tab: complete")
</code>
Add .pythonrc to .bashrc
<code bash>
export PYTHONSTARTUP="$HOME/.pythonrc"
</code>
Load the environment variable from .bashrc:
<code bash>
$source ~/.bashrc
</code>
Activate env
<code bash>
workon proj-env
</code>

Source: [[http://paulpodolny.blogspot.com/2013/06/python-autocompletion-and-virtualenv.html|Python autocompletion and virtualenv]]