[Tutor] On a looping input, subsequent inputs are hidden

[Peter Otten]

Steven D'Aprano wrote:

> What's exit()? Is that sys.exit?

One of those things a newbie finds out immediately, a veteran never ;) 

Since 2.5 site.py adds a Quitter object under the names "exit" and "quit" to 
Python's built-ins. They are meant to provide the accidental Python user 
with an obvious way to leave the interactive interpreter and /almost/ 
succeed:

>>> exit
Use exit() or Ctrl-D (i.e. EOF) to exit

According to

<http://docs.python.org/2/library/constants.html#constants-added-by-the-site-module>

"[t]hey are useful for the interactive interpreter shell and should not be 
used in programs".