if in expression

[Fredrik Lundh]

Hrvoje Niksic wrote:

>> If you want lazy evaluation, you can use lambdas:
>>
>> iif(cond, lambda: then, lambda: else_)()
> 
> Your code uses "iif" and attempts to evaluate a tuple; could you post
> an example that works?
> 
> I ask because it's not clear what you mean by lazy evaluation in this
> context.  The ternary "if" expression introduced in Python 2.5 only
> evaluates then_value or else_value depending on the outcome of cond.
> How is that different than using a lambda?

the second part of Diez' answer is a reply to the second part of the 
OP's question.

</F>