使用virtualenv时将python2.7软件包更改为我所需的python3.5软件包

Question

When I create the virtualenv, if I do not add the --no-site-packages as param:

virtualenv venv 

I can get the packages, in the

venv/lib/

there are a python2.7 package:

python2.7 

under the python2.7 there are site-packages.

But, I have a requirement, I want copy the python3.5 to the venv/lib/ how can I do this?

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EDIT-1

I use the post method create the venv , in the venv/lib/ :

there is the python3.5 directory, but in the venv/lib/python3.5/site-packages there are few packages:

But in my Mac's sitepages:

there are so many packages, my requirement is add those packages in the venv when create the venv :

my origin site-packages path is: /Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages

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EIDT-2

Before, I do not use virtualenv, I have installed many site-packages in my Mac, ( /Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages ), and I want to use venv now, so I am looking for a method to create the venv and the site-packages I have installed should include in it.

Answer 1

First of all you should install virtualenv using python3.5.
there is a tricky way that I use, I add some lines to the .bashrc file like this:

export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python3.5
alias v.activate="source /usr/local/bin/virtualenvwrapper.sh"

so whenever I want to change my virtualenv to be on python3.5 I run the v.activate command, and then create my virtual environment with python3.5.

remember this that:

1.I use virtualenvwrapper instead of virtualenv

2.Dont forget to run source .bashrc after you add those lines to bashrc