How to load current buffer into Python interpreter in Emacs?

I'm trying to use开发者_如何学Go emacs to edit and run python programs (emacs23 and python 2.6 on Ubuntu 10.10).

• I read a file into Emacs (C-x -C-f)
• I start the interperter (Menu Python - Start interpreter, I haven't found the keyboard shortcut for this yet)
• Emacs split the frame in two windows
• I place the cursor in the python file (C-x o)

Now I want to run the Python code in the upper window in the Python interpreter in the lower window. Other places have suggested:

• C-c C-c, but that does nothing
• C-c !, but emacs says that that command is undefined

I have installed ropemacs (sudo apt-get install python-ropemacs) but that didn't change anything.

You may want to hit "C-c C-z" (switch to interpreter) to see the results of and buffers or regions you evaluated.