How to realize the interactive python in Eclipse?

[purple]

I have installed the Eclipse and the plug-in Pydev. Also, I have add an
python program in the external tools. When I run the python program in
the external tools, i can type python command just like in the python
shell.But when I finished running a python file, in the console, I
could not type any command to check some argument generated in the
process. Is there any way I can make it?
thank you~~