IDLE allows you to open a file to write our programs (loading CRTL + N if I'm not mistaken), but due to a problem with Python's IDLE 3.4.1 or 3.4.0, I can not use it, it correctly. I can use Python only through the terminal.
Is it possible to open a file with IDLE from the terminal?
You can open any file (including a new one, already giving it a name), simply by typing in the terminal:
idle arquivo.py
The Python interpreter only runs Python programs, it does not come with a built-in editing interface. What you can do is use a text editor to write your program (any one except Word serves: Notepad ++, Scite, Gedit, Emacs, Vim, etc ...) and then pass the file you created to the python interpreter using the command line.
If you create a meuprograma.py file you can run it on the terminal using
python meuprograma.py
If you want to load your program into an interactive Python loop you can use the -i flag
python -i meuprograma.py