擅长:python、mysql、java
<p>给出了一个示例类,该类描述了如何访问案例中所需的元素:</p>
<pre><code>class Sentiment: # Example class
def __init__(self, polarity, subjectivity):
self.polarity = polarity
self.subjectivity = subjectivity
ar = [[Sentiment(polarity=0.35, subjectivity=0.65),
Sentiment(polarity=0.0, subjectivity=0.0),
Sentiment(polarity=0.0, subjectivity=0.0),
Sentiment(polarity=0.6, subjectivity=0.87),
Sentiment(polarity=0.0, subjectivity=0.0),
Sentiment(polarity=0.0, subjectivity=0.0)],
[Sentiment(polarity=0.0, subjectivity=0.0),
Sentiment(polarity=0.5, subjectivity=0.8),
Sentiment(polarity=0.0, subjectivity=0.0),
Sentiment(polarity=-0.29, subjectivity=0.54),
Sentiment(polarity=0.0, subjectivity=0.0),
Sentiment(polarity=0.25, subjectivity=1.0)]]
print(ar[0][0].polarity) # this is the first polarity value
</code></pre>