擅长:python、mysql、java
<p><a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.concatenate.html" rel="nofollow noreferrer"><strong>^{<cd1>}</strong></a></p>
<pre><code>np.concatenate(df.keyPhrases) #data courtesy vurmux
</code></pre>
<hr/>
<pre><code>array(['word1', 'word2', 'word4', 'word5', 'word7', 'word8', 'word9'],
dtype='<U5')
</code></pre>
<p>另一种方式:</p>
<pre><code>import functools
import operator
functools.reduce(operator.iadd, df.keyPhrases, [])
#['word1', 'word2', 'word4', 'word5', 'word7', 'word8', 'word9']
</code></pre>