擅长:python、mysql、java
<p>使用<a href="http://docs.python.org/2/tutorial/datastructures.html#list-comprehensions" rel="nofollow">list comprehension:</a></p>
<pre><code>>>> X = [[('Happy', 'NNP'), ('Mother', 'NNP')], [('Day', 'NNP')], [('Joey', 'NNP'), ('M.', 'NNP'), ('Bing', 'NNP')], [('kind', 'NN')], [('happy', 'JJ'), ('wife', 'NN')], [('mother', 'NN')], [('friend', 'NN')]]
>>> Y = [' '.join(z[0] for z in x) for x in X]
>>> Y
['Happy Mother', 'Day', 'Joey M. Bing', 'kind', 'happy wife', 'mother', 'friend']
</code></pre>