The Ternary operator mentioned is only available from Python 2.5. From the WeekeePeedeea:
Though it had been delayed for several
years by disagreements over syntax, a
ternary operator for Python was
approved as Python Enhancement
Proposal 308 and was added to the 2.5
release in September 2006.
Python's ternary operator differs from
the common ?: operator in the order of
its operands; the general form is op1
if condition else op2. This form
invites considering op1 as the normal
value and op2 as an exceptional case.
Before 2.5, one could use the ugly
syntax (lambda x:op2,lambda
x:op1)[condition]() which also takes
care of only evaluating expressions
which are actually needed in order to
prevent side effects.
