[Tutor] cycle w/ shuffle

kevin parks kp8 at mac.com
Thu Apr 27 00:43:48 CEST 2006

I am trying to write a loop that iterates over a sequence and do 
something x number of times. But sometimes i will need more events 
(larger number x) than i have have items in the sequence, so if i need 
more events that i have stuff in my sequence i would like to have the 
loop reload and shuffle the deck and start all over again, reloading as 
many times as necessary to get the number of events needed. I suppose i 
could go around cyclically modulo the list size but i would want to 
shuffle the deck before doing that again...

it seems to me that i need something like itertools cycle, except that 
i need to keep track of when i have exhausted my list and then call 
random.shuffle() on my sequence.

def cycle(iterable):
	saved = []
	for element in iterable:
		yield element
	while saved:
		for element in saved:
			yield element
def test():
		seq = ('one', 'two', 'three', 'four', 'five', 'six', 'seven', 
'eight', 'nine', 'ten')
		loop = cycle(seq)
		count = 1
		for item in range(25):
			print count, loop.next()
			count = count + 1

if __name__ == '__main__':

here i have gone through my list 2.5 times .. and somewhere after the 
second and third(tho incomplete) rounds i need to shuffle... but i am 
not sure how to fix that.

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