Will flatten an array of arbitrarily nested arrays of integers into a flat array of integers. e.g. [[1,2,[3]],4] -> [1,2,3,4].

Array Flattener

import itertools

def flatten(iterable):
    iterable = iter(iterable)

    while True:
        try:
            item = iterable.next()
        except StopIteration as e:
            break
        try:
            data = iter(item)
            iterable = itertools.chain(data, iterable)
        except:
            yield item
            
            
# To use:
# array = [[1,2,[3, [5]]],[4]]
# merged = flatten(array)
# next(merged) will lazily yeild the next element in the sequence