擅长:python、mysql、java
<p>方法之一:</p>
<pre><code>msg_list = [('_SIZE', b'\\100'), ('_MODE', b'\\x00'), ('_EXPIRY', b'\\x1000')]
for msg in msg_list:
if (msg[0] == "_EXPIRY"):
print (msg[1])
break
</code></pre>
<p>另一种方法是将其转换为<code>dict</code>并访问密钥,如下所示:</p>
<pre><code>msg_list = [('_SIZE', b'\\100'), ('_MODE', b'\\x00'), ('_EXPIRY', b'\\x1000')]
try:
msg_dict = dict(msg_list)
print(msg_dict['_EXPIRY'])
except KeyError as ex:
print (f"Entry for _EXPIRY does not exists")
</code></pre>