Question

I know now we cant use sys.exit() . So how do I exit in the new version of Python?

Answer 1

import sys
sys.exit()

details from the sys module documentation:

exit([arg])

Exit from Python. This is
implemented by raising the SystemExit
exception, so cleanup actions
specified by finally clauses of try
statements are honored, and it is
possible to intercept the exit attempt
at an outer level. The optional
argument arg can be an integer giving
the exit status (defaulting to zero),
or another type of object. If it is an
integer, zero is considered
successful termination'' and any
nonzero value is consideredabnormal
termination” by shells and the like.
Most systems require it to be in the
range 0-127, and produce undefined
results otherwise. Some systems have a
convention for assigning specific
meanings to specific exit codes, but
these are generally underdeveloped;
Unix programs generally use 2 for
command line syntax errors and 1 for
all other kind of errors. If another
type of object is passed, None is
equivalent to passing zero, and any
other object is printed to sys.stderr
and results in an exit code of 1. In
particular, sys.exit(“some error
message”) is a quick way to exit a
program when an error occurs.

Source