[Tutor] functions, system statements, sleep

[Matthias Hager]

I'm a complete idiot, but when I create a function in Python, how do I run it? Say I create a function that has a main menu. And after the user goes through the introductory, how can I run the main_menu function?

How can I get the python interpreter to run a Unix system function? Like say I want it to use 'clear' (Adequately used to clear the screen) How can I get my program, runing in command line to do that?

And is there a sleep function in Python, that will make it wait for a couple of seconds before doing anything? There is one in Perl, and I find it really useful.

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