<p>所以,我见过这种类型的东西好几次,但我从来没有找到任何关于它。有人能解释一下这些“r'foo(*)是什么东西,并把我和python文档联系起来吗?我认为它们与在字符串中查找关键字有关。我说得对吗?你知道吗</p>
<pre><code>(r'why (.*) i (.*)\?',
( "You%1%2?",
"Perhaps you only think you%1%2")),
(r'why (.*) you(.*)\?',
( "Why%1 you%2?",
"%2 I%1",
"Are you sure I%2?")),
(r'why (.*)\?',
( "I cannot tell you why%1.",
"Why do you think %1?" )),
</code></pre>
<p>这个特定的代码段来自nltk.chat.zen语言模块。你知道吗</p>