I have some code to perform an exponential backoff. I am interacting with a few
different web services. Checking for a specific Exception and then re-invoking
the failed call after waiting a bit. I don't want to code the backoff in ten
different places. Really miss the C pre-processor.
I am tempted to try something like the following, but I understand that eval
should be a last resort.
Any pythonic best practice for this situation?:
from time import sleep
from random import randint
def exponentialbackoff(exception,numretrys,somecode):
currentIteration=0
SuccessfulCall=False
rc=None
globalnamespace=getglobals(,globals)
while currentiteration<numretrys:
try:
rc=eval(somecode,globalnamespace)
SuccessfulCall=True
break
except exception:
currentiteration = currentiteration+1
sleepytime=randint(0,4**currentiteration)
sleep(sleepytime)
return (SuccessfulCall,rc)
---
Gil Cosson
Bremerton, Washington
360 620 0431
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