> My own preference would be:
>
> def foo(x):
> if x >= 0:
> return math.sqrt(x)
> return None
Kind of getting into the weeds here, but I would always invert this to
"return errors early, and keep the normal flow at the main indentation
level". Depends a little on what foo() means, but it seems to me the
"return None" case is the exceptional/error case, so this would be:
def foo(x):
if x < 0:
return None
return math.sqrt(x)
The handling of errors is done first, and the normal case stays at the
main indentation level. Is this discussed in style guides at all? I
don't see anything directly in PEP 8, but I might be missing
something.
Oh wait, I just noticed this is exactly how Guido has it in his PEP
addition with the definition of bar(). :-|
-Ben
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