擅长:python、mysql、java
<p>这是因为Python正在评估<code>"Yes"</code>的“真实性”。在</p>
<p>您的第一个if语句解释如下:</p>
<p><code>if the variable "yearlikedislike" equals "yes" or the string literal "Yes" is True (or "truthy"), do something</code></p>
<p>每次都需要与<code>yearlikedislike</code>进行比较。在</p>
<p>试着这样做:</p>
<pre><code>if yearlikedislike in ("yes", "Yes", "YES", "yep", "yup", "Yep", "Yup"):
#do something
</code></pre>