The try
statement has another optional clause which is intended to
define clean-up actions that must be executed under all circumstances.
For example:
>>> try: ... raise KeyboardInterrupt ... finally: ... print 'Goodbye, world!' ... Goodbye, world! Traceback (innermost last): File "<stdin>", line 2 KeyboardInterrupt >>>A
finally
clause is executed whether or not an exception has
occurred in the try
clause. When an exception has occurred, it
is re-raised after the finally
clause is executed. The
finally
clause is also executed ``on the way out'' when the
try
statement is left via a break
or return
statement.
A try
statement must either have one or more except
clauses or one finally
clause, but not both.