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Cycle through elements in an iterator

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cycle is an infinite iterator. 

>>> import itertools as it
>>> it.cycle('ABCD')
A B C D A B C D A B C D ...

Therefore, take care to give boundaries when using this to avoid an infinite loop. Example: 

>>> # Iterate over each element in cycle for a fixed range
>>> cycle_iterator = it.cycle('abc123')
>>> [next(cycle_iterator) for i in range(0, 10)]
['a', 'b', 'c', '1', '2', '3', 'a', 'b', 'c', '1']
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Itertools Module:
* Itertools Module
* itertools.dropwhile
* Combinations method in Itertools Module
* Take a slice of a generator
* Zipping two iterators until they are both exhausted
* Grouping items from an iterable object using a function
* itertools.takewhile
* itertools.count
* itertools.product
* itertools.repeat
* Get an accumulated sum of numbers in an iterable
* Cycle through elements in an iterator
* itertools.permutations
* Chaining multiple iterators together
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165 hashlib
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184 Python Lex-Yacc
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188 Writing to CSV from String or List
189 Raise Custom Errors Exceptions
190 Using loops within functions
191 Contributors