Python: import source code into Eclipse

I recently started using over eclipse

for my class IDLE

. So far, I have no problem writing new code and creating new projects in eclipse.

However, when I open old code that was not originally written in my current project, eclipse seems to only open it as a text file.

For example, when I want to run a piece of code, I get a popup asking ANT build instead of using it with pydev

. Also the code won't show up in pydev package explorer

.

How do I import source code

into my project so eclipse

will treat it as such.