擅长:python、mysql、java
<pre><code>list = ['A1B2244', 'B3H7654', 'A1O6541', 'J4777']
#first initialize lists based 2 first elements
d= {i[:2]:[] for i in list}
#loop to add items by key
[d.get(i[:2]).append(i[2:]) for i in list]
print(d)
</code></pre>
<p>输出:</p>
<pre><code>{'A1': ['B2244', 'O6541'], 'J4': ['777'], 'B3': ['H7654']}
</code></pre>