擅长:python、mysql、java
<blockquote>
<pre><code>full_name = user_info['first'], user_info['last']
</code></pre>
<p>I expect this to append the value <code>albert einstein</code> and <code>marie curie</code> […]</p>
</blockquote>
<p>你的期望是错误的。你知道吗</p>
<blockquote>
<p>but why is my method wrong and the following therefore correct...</p>
<pre><code>full_name = user_info['first'] + " " + user_info['last']
</code></pre>
</blockquote>
<p>因为<code>+</code>是字符串的连接运算符,<code>,</code>不是。你知道吗</p>