Python Repeat List to Max Number of Elements
Question: What is the most efficient method to repeat a list up to a max element length?

To take this:

    
    
    list = ['one', 'two', 'three']
    max_length = 7
    

And produce this:

    
    
    final_list = ['one', 'two', 'three', 'one', 'two', 'three', 'one']
    


Answer: I'd probably use `iterools.cycle` and `itertools.islice`:

    
    
    >>> from itertools import cycle, islice
    >>> lst = [1, 2, 3]
    >>> list(islice(cycle(lst), 7))
    [1, 2, 3, 1, 2, 3, 1]
    

