def index_lastnot(ol, value):
    """
        from elist.elist import *
        ol = [1,'a',3,'a',4,'a',5]
        index_lastnot(ol,'a')
        ####lastIndexOfnot is the same as index_lastnot
        lastIndexOfnot(ol,'a')
    """
    length = ol.__len__()
    for i in range(length - 1, -1, -1):
        if value == ol[i]:
            pass
        else:
            return i
    return None
