class LOLERROR(Exception):
	pass
 
def retry(tries, delay=3, backoff=2):
	def _retry(f):
		def f_retry(*args, **kwargs):
			last_exception = None
			for attempt in range(1, tries + 1):
				try:
					ret = f(*args, **kwargs)
				except Exception as e:
					last_exception = e
					if attempt < tries:
 
						print "sleep:", delay * (backoff ** (attempt - 1))
 
					continue
				# success
				return ret
			# ran through our tries, bail out
			raise last_exception 
		return f_retry
	return _retry
 
 
#@retry(5)	
def foo(a):
	print a
	raise LOLERROR
 
retry(5)(foo)("test")

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