On Nov 19, 10:21 am, Gilles Ganault <[EMAIL PROTECTED]> wrote:
> On 19 Nov 2008 14:37:06 +0000 (GMT), Sion Arrowsmith
>
> <[EMAIL PROTECTED]> wrote:
> >Note very carefully that the "else" goes with the "for" and not the "if".
>
> Thanks guys.
And if you end up doing this for several different functions, you can
factor it out with the following decorator:
class MaxRetriesExceededError(Exception):
pass
def retry(n):
def decorator(f):
def wrapper(*args, **kwds):
for i in xrange(n):
r = f(*args, **kwds)
if r: return r
raise MaxRetriesExceededError
return wrapper
return decorator
If the number of retries is fixed and known at "compile" time, you can
use the standard decorator syntax:
@retry(5)
def CheckIP():
...
If not, just decorate it explicitly at runtime:
def CheckIP():
...
n = int(raw_input('Give number of retries:'))
CheckIP = retry(n)(CheckIP)
HTH,
George
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