[Tutor] For/else construct was: Re: (no subject)

[Alan Gauld]

On 08/02/12 19:04, Patrick Dempster wrote:

> I might be missing something but I can't see a reason for the "else:"
> clause attached to the "for" statement, could anyone provide an example
> where or why someone might use the "else:" clause with the for loop?


There have been a couple of sample cases given already but here is an 
example of what you would need to do without it.


broken_loop = False
for item in collection:
      process(item)
      if condition:
         broken_loop = True
         break
if not broken_loop:
    do_the_else_part()

do_this_regardless()


It's not a huge pain but this is easier:


for item in collection:
      process(item)
      if condition:
         break
else:
    do_the_else_part()

do_this_regardless()

HTH,

-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/