IDLE file saving problem

[newb.py]

I am learning Python and need to use use IDLE, but I am having a
problem. When I open a new window in IDLE and write my code, all is
well. The coloring works and is very helpful. However, when I save the
file I am working on, all the color disappears. And what is more
frustrating is that when I open the saved file, it opens in TextEdit,
so I have to copy it back into a new IDLE window to work on the code.

If someone could clear up this seemingly simple problem for me, I
would really appreciate it.

Much thanks,
Sean