def is_strictly_increasing(L):
    """ Returns True if the list contains strictly increasing values. 
    
        Examples: 
            is_strictly_increasing([0,1,2,3,4,5]) > True
            is_strictly_increasing([0,1,2,2,4,5]) > False
            is_strictly_increasing([0,1,2,1,4,5]) > False
    """
    for x, y in zip(L, L[1:]):
        if x > y: return False
    return True