擅长:python、mysql、java
<pre><code> >>> a = ["id123-3431","id124-4341","id125-4341","id126-1w","id789-123","id666"]
>>> b = ["id123-12345","id124-1122","id125-13232","id126-12332","id1new","idagain"]
>>> c = (s.split('-')[0] for s in b)
>>> [ele.split('-')[0] for ele in a if str(ele.split('-')[0]) not in c]
['id789', 'id666']
>>>
</code></pre>