python顺序搜索的两种形式

def UnsequentialSearch(ulist, item):
    """
    这个函数接受列表与目标元素作为参数, 并返回一个表示目标元素是否存在的布尔值。布尔型变量found的初始值为False, 如果找到目标元素，就将它的值改为Tru
    """
    pos = 0
    found = False
    while pos < len(ulist) and not found:
        if ulist[pos] == item:
            found = True
        else:
            pos += 1
    return found
 
def OrderedListSequentialSearch(ulist,item):
    pos = 0
    found = False
    stop = False
    while pos < len(ulist) and not found and not stop:
        if ulist[pos] == item:
            found = True
        else:
            if ulist[pos] > item:
                stop = True
            else:
                pos = pos+1
    return found
 
if __name__ == '__main__':
    # ret = UnsequentialSearch([1, 3, 10, 5, 8], 7)
    # print(ret)
    ret = OrderedListSequentialSearch([1, 3, 5, 7, 10], 6)
    print(ret)