How do you set your pythonpath in an already-created virtualenv?

Question

What file do I edit, and how? I created a virtual environment.

Accepted Answer

The most elegant solution to this problem is here.

Original answer remains, but this is a messy solution:

If you want to change the `PYTHONPATH` used in a virtualenv, you can add the following line to your virtualenv's `bin/activate` file:

```
export PYTHONPATH="/the/path/you/want"
```

This way, the new `PYTHONPATH` will be set each time you use this virtualenv.

EDIT: (to answer @RamRachum's comment)

To have it restored to its original value on `deactivate`, you could add

```
export OLD_PYTHONPATH="$PYTHONPATH"
```

before the previously mentioned line, and add the following line to your `bin/postdeactivate` script.

```
export PYTHONPATH="$OLD_PYTHONPATH"
```

Solution