If I run pip install Django I get
pip install Django
Requirement already satisfied: Django in /usr/local/lib/python2.7/dist-packages
I\'
You have to install pip3 :
sudo apt-get install python3-pip
Then, you have to work with venv
venv
pip3 -p python3.6 virtualenv name
And you have to write :
pip3 install Django #or specific version pip3 install Django==1.10.5