擅长:python、mysql、java
<pre><code>cmds=[['ADD', '1'], ['LOAD', '5'], ['SQR'], ['ADD', '3']],
list slicing can use If you want to choose selectively ,
(a) cmd excluding cmd[1]
print(cmds[:1] + cmds[2:)
(b) cmd excluding cmd[2]
print(cmds[:2] + cmds[3:])
</code></pre>