If you’re running Aptana 3 Beta Windows, PyDev isn’t in the default list of addons via their package installer.
To install it, you just need to add the PyDev site to the installer.
- Go to Help > Install New Software
- Click “Add”
- Fill in
PyDevfor name, and
http://www.pydev.org/updates/for the location.
- Find PyDev by typing Py in the filter text
- Check PyDev and be on your way