Basically I have code completion working (to the best of my knowledge that it 'works') in Eclipse, but it's not nearly as good as what Visual Studio has. I have it set to call auto-complete when ( is pressed, but doing this does not show a list of the method parameters. I have to mouse over the method for that to happen, and I'd prefer for it to happen while I type, like Intellisense in VS.
I'm using Aptana 3 with PyDev if it's relevant.
Just press Ctrl + Space, as Jonas Karlsson said.
How do I get Eclipse to show me a method's signature while typing?