'''
def tm097():
    '''
    with .. as ..打开会自动关闭。
    其他方式打开，别忘了通过代码关闭。
    '''
    path = 'd:/test.txt'
    with open(path,'w+') as f:f.write('')
    while 1:
        c = input()
        if c=='#':
            break
        else:
            with open(path,'a+') as f:f.write(c)