def section(itr, size):
    """
    Goes through @itr and splits it up into chunks of @size. @itr must be 
    subscriptable.
    
    >>> section('quantum_junk10', 3)
    ['qua', 'ntu', 'm_j', 'unk', '10']
    
    AUTHORS:
    v0.3.1+             --> pydsigner
    """
    res = []
    while itr:
        res.append(itr[:size])
        itr = itr[size:]
    return res
