Wayne wrote:
Hi, I think I recall seeing this here, but I wanted to make sure I'm
correct.
Is the best way to test for an empty list just test for the truth value?
I.e.
mylist = [1,2,3]
while mylist:
print mylist.pop()
Thanks,
Wayne
My take is simple: Use the above form if you *know* that mylist is in
fact a list. If you don't know its type for sure (the name is a clue,
but not conclusive ;-) ) then use a more specific test.
In your case, you know it's a list, or least something that supports
pop(). So your form should be great.
DaveA
Hello all,
Just a newbie question, but when would you test for an empty list? Is it
part of a code error detection or an error check to make sure that there is
user input?
Couldn't you just use something like:
while len(mylist) > 0:
continue program
else:
print "mylist is empty
or is my lack of python knowledge preventing me from seeing the meaning of
the question?
Thanks in advance,
Katt
_______________________________________________
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
