回答此问题可获得 20 贡献值,回答如果被采纳可获得 50 分。
<p>我是python新手,希望您能帮助我解决这个问题,我使用的是python3.4。在</p>
<p>我有一个单子,上面有正反两个词,还有频率</p>
<p>这是原始列表:</p>
<pre><code>`finalSentiment = [('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), ('hijacked', 'negative'), 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</code></pre>
<p>我要做的是计算列表中每个单词的正负数。
所以如果负数比较多,这个词就是负数。
然后我可以列出一个新的清单,比如:
例如:<code>newList = [('hijacked','negative'),('left','negative'), . . .]</code></p>
<p>a)我尝试使用<code>num = Count(finalSentiment).most_common()[:50]</code>函数,得到如下新列表。在</p>
^{pr2}$
<p>我想做的是比较词的频率,不管是正的还是负的,都是比较高的。
所以,如果negative更高,我想创建一个包含单词和negative的新列表。在</p>
<p>例如:<code>[('hijacked','negative'),('left','negative'), . . .]</code></p>
<p>每个单词在列表中只能有正数或负数。在</p>
<p>我尝试使用for循环访问列表中的每一项。在</p>
<pre><code>for item in num:
unique_word = item[0]
temp = unique_word[0]
temp1 = unique_word[1]
frequency = item[1]
</code></pre>
<p>但是我不知道在我访问数据之后如何操作它。在</p>
<p>b)我使用counter()函数并得出以下列表:</p>
<pre><code>cnt = Counter()
for word in finalSentiment:
cnt[word] += 1
print(cnt)
Counter({('hijacked', 'negative'): 302, ('left', 'negative'): 88, ('one', 'negative'): 79, ('befo', 'negative'): 72, ('tcot', 'negative'): 70, ('radical', 'negative'): 70, ('tanker', 'negative'): 55, ('like', 'negative'): 47, ('right', 'negative'): 36, ('oil', 'negative'): 26, ('hijacked', 'positive'): 22, ('pirates', 'negative'): 21, ('terrorist', 'negative'): 21, ('people', 'negative'): 21, ('morons', 'negative'): 18, ('loony', 'negative'): 18, ('get', 'negative'): 17, ('account', 'negative'): 12, ('flag', 'negative'): 11, ('time', 'negative'): 10, ('angry', 'negative'): 9, ('like', 'positive'): 8, ('day', 'negative'): 8, ('know', 'negative'): 8, ('dem', 'negative'): 7, ('tanker', 'positive'): 7, ('got', 'negative'): 6, ('left', 'positive'): 6, ('one', 'positive'): 6, ('driver', 'negative'): 6, ('long', 'negative'): 6, ('radical', 'positive'): 5, ('befo', 'positive'): 5, ('tcot', 'positive'): 5, ('pirates', 'positive'): 3, ('live', 'negative'): 3, ('time', 'positive'): 2, ('pay', 'negative'): 2, ('oil', 'positive'): 2, ('mt', 'negative'): 1, ('loony', 'positive'): 1, ('morons', 'positive'): 1, ('long', 'positive'): 1, ('got', 'positive'): 1, ('sadly', 'negative'): 1, ('day', 'positive'): 1, ('none', 'positive'): 1, ('fathers', 'negative'): 1, ('account', 'positive'): 1, ('malaysia', 'negative'): 1, ('right', 'positive'): 1, ('people', 'positive'): 1, ('know', 'positive'): 1, ('look', 'positive'): 1})
</code></pre>
<p>我现在的问题是如何比较,例如“劫持”这个词,负数更高。因此,在新的列表中,“劫持”应该是“否定的”,因此:
例如:newList=<code>[('hijacked','negative'),('left','negative'), . . .]</code></p>
<p>c)或者我应该自己计算正数和负数,而不是使用<code>most_common()</code>函数或<code>counter()</code>。
我计算正数和负数的问题是因为列表中有多个单词。如果这个词只是被“劫持”了,加上积极的和消极的,我想我可以解决这个问题。在</p>
<p>任何帮助都将不胜感激。在</p>