[EMAIL PROTECTED] schrieb:
Hi,
I'm using IronPython to evaluate expressions, so I can't use the
return statement but have to say it in an one-liner. Using C/C++ I
could use "cond ? then : else" to have an expression-if, but in Python
there's no such operator. The "cond and then or else"-trick only seems
to work for non-false "then"s and is not very readable.
So is the pythonic way to def iif(cond, then, else_): if cond: return
then; else: else_; ? But actually this is not the same, because "then"
and "else_" are evaluated independently of cond...
What is the right way to have if in an expression?
Since python 2.5, it is
<then_value> if <cond> else <else_value>
If you want lazy evaluation, you can use lambdas:
iif(cond, lambda: then, lambda: else_)()
Diez
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