擅长:python、mysql、java
<p>您缺少所需的缩进。替换:</p>
<pre><code>if user_name == "Y":
print("acces denied")
elif user_name == "X":
print("Nope")
else:
print("Hello, " + user_name + "! Have a good day")
</code></pre>
<p>签署人:</p>
<pre><code>if user_name == "Y":
print("acces denied")
elif user_name == "X":
print("Nope")
else:
print("Hello, " + user_name + "! Have a good day")
</code></pre>
<p>希望它能运行。你知道吗</p>
<p><sub>对我有用。</sub></p>
<p><sub><sub>如果我将其提供给Python 2,则不会。</sub></sub></p>