擅长:python、mysql、java
<p>如果您只想将列表展平,只需使用<code>itertools.chain.from_iterable</code>:<a href="http://docs.python.org/library/itertools.html#itertools.chain.from_iterable">http://docs.python.org/library/itertools.html#itertools.chain.from_iterable</a></p>