擅长:python、mysql、java
<p>您可以使用简单的<code>in</code>运算符检查键是否在字典中:</p>
<pre class="lang-py prettyprint-override"><code>countyzips = {"90210": "Beverly Hills", "90001": "Los Angeles"}
zip_ = input("enter zip code:")
if zip_ in countyzips:
print(f"zip code = {zip_}, city = {countyzips[zip_]}")
else:
print(f"zip code = {zip_} is not in Los Angeles County")
</code></pre>
<p>打印(例如):</p>
<pre class="lang-none prettyprint-override"><code>enter zip code:90210
zip code = 90210, city = Beverly Hills
</code></pre>
<hr/>
<p>注意:不要使用<code>zip</code>、<code>list</code>等名称。它们是Python内置的阴影</p>