擅长:python、mysql、java
<p><code>request.json()</code>实际返回dict,因此可以使用<code>.get()</code>方法,如果找不到键,则返回<code>None</code>:</p>
<pre><code>blackListCountry = request.json.get("blackListCountry")
if blackListCountry is None:
# key is not found
else:
print(blackListCountry)
</code></pre>