trinary operator - if then else

[Alchemist]

What is Python's version for the trinary if..then..else operator?

I want a one-liner such as
a?b:c
for the if..then..else control structure
if a
then b
else c

Does Python 2.4 support it?

 

[Peter Otten]

What is Python's version for the trinary if..then..else operator?

true_value if condition else false_value

Does Python 2.4 support it?

No, it requires 2.5 or later.

Peter

 

[Michael Bentley]

What is Python's version for the trinary if..then..else operator?

I want a one-liner such as
a?b:c
for the if..then..else control structure
if a
then b
else c

Does Python 2.4 support it?

Not precisely, but you can *usually* get away with:

a and b or c

 

[Diez B. Roggisch]

Michael >>

Not precisely, but you can *usually* get away with:

a and b or c

This is really bad advice, as long as you don't explain why it "usually"
works (and often enough not). This for example won't work:
''

The reason is that the if-value has to be bool(v) == True, otherwise the
short-circuiting of the and will prevent the 0 from being returned.

So in general, _don't_ use this!

Diez

 

[Nick Craig-Wood]

Michael >>

This is really bad advice, as long as you don't explain why it "usually"
works (and often enough not). This for example won't work:

''

You can use this if you want it to be bullet proof

(a and or [c])[0]

Not exactly elegant though!