莱娜和她的图片隐写 2020-04-15 python 4.15面向对象程序设计课堂小结 偷懒! <br> <p><br><br><br>Tips:<br><br>1.Matplotlib的子图<a href="https://www.jianshu.com/p/de223a79217a" target="_blank" rel="noopener">subplot</a><br><br></p> <p>2.<a href="https://www.runoob.com/python/python-func-bin.html" target="_blank" rel="noopener">bin()函数</a>:返回一个整数int或者长整数long int的二进制表示。<br><br></p> <p>3.<a href="https://www.runoob.com/python/att-string-zfill.html" target="_blank" rel="noopener">zfill()函数</a>:返回指定长度的字符串，原字符串右对齐，前面填充0。<br><br></p> <p>4.int(x, 2):转成二进制（默认十进制）<br><br></p> <p>5.<a href="https://www.runoob.com/python/python-func-chr.html" target="_blank" rel="noopener">chr()函数</a>用一个范围在 range（256）内的（就是0～255）整数作参数，返回一个对应的字符。</p>