On 9/29/06, Johan Steyn <[EMAIL PROTECTED]> wrote:
> I agree that it is meaningless without a break statement, but I still find
> it useful when I want to determine whether I looped over the whole list or
> not. For example, if I want to see whether or not a list contains an odd
> number:
>
> for i in list:
> if i % 2 == 1:
> print "Found an odd number."
> break
> else:
> print "No odd number found."
>
> Without the else clause I would need to use an extra variable as a "flag"
> and check its value outside the loop:
You can use generator comprehension:
if (i for i in list if i % 2 == 1):
print "Found an odd number."
else:
print "No odd number found."
I *think* any() should also work:
if any(i % 2 == 1 in list):
....
And so on. For every use of the for/else clause there exists a better
alternative. Which sums up my opinion about the construct -- if you
are using it, there's something wrong with your code.
--
mvh Björn
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