擅长:python、mysql、java
<p>当您调用<code>update("my_url")</code>时,<a href="https://docs.python.org/2/library/hashlib.html" rel="nofollow">concatenating</a>就是哈希输入的那个字符串。在</p>
<blockquote>
<p>You can now feed this object with arbitrary strings using the update() method. At any point you can ask it for the digest of the concatenation of the strings fed to it so far using the digest() or hexdigest() methods.</p>
</blockquote>
<p>每次需要新的哈希值时,都需要生成一个新的<code>sha1</code>对象。在</p>