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问计算列表中每个单词的正字符串和负字符串数。
EN

Stack Overflow用户

提问于 2015-06-22 01:37:04

回答 2查看 557关注 0票数 1

我是python的新手，希望您能帮助我解决这个问题，我正在使用python3.4。

我有一个包含单词的列表，无论是积极的还是消极的，并且它的频率

这是最初的清单：

/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
* `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'), ('hijacked', 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*/

我要做的是从我的列表中计算出每个单词的正数和负数。因此，如果负数较高，则单词为负数。然后我可以拿出一个新的列表，如:例如：newList = [('hijacked','negative'),('left','negative'), . . .]

( a)我尝试使用num = Count(finalSentiment).most_common()[:50]函数，并给出了下面的新列表。

num =  [(('hijacked', 'negative'), 302), (('left', 'negative'), 88), (('one', 'negative'), 79), (('befo', 'negative'), 72), (('radical', 'negative'), 70), (('tcot', 'negative'), 70), (('tanker', 'negative'), 55), (('like', 'negative'), 47), (('right', 'negative'), 36), (('oil', 'negative'), 26), (('hijacked', 'positive'), 22), (('pirates', 'negative'), 21), (('people', 'negative'), 21), (('terrorist', 'negative'), 21), (('loony', 'negative'), 18), (('morons', '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), (('long', 'negative'), 6), (('left', 'positive'), 6), (('driver', 'negative'), 6), (('one', 'positive'), 6), (('got', 'negative'), 6), (('tcot', 'positive'), 5), (('radical', 'positive'), 5), (('befo', 'positive'), 5), (('pirates', 'positive'), 3), (('live', 'negative'), 3), (('oil', 'positive'), 2), (('time', 'positive'), 2), (('pay', 'negative'), 2), (('none', 'positive'), 1), (('people', 'positive'), 1), (('morons', 'positive'), 1), (('long', 'positive'), 1), (('account', 'positive'), 1), (('mt', 'negative'), 1), (('got', 'positive'), 1), (('day', 'positive'), 1), (('loony', 'positive'), 1), (('know', 'positive'), 1), (('fathers', 'negative'), 1)]

我想做的是比较单词的频率，无论是正的还是负的都是高的。所以，如果否定词较高，我想要创建一个新的列表，其中包含单词和否定。

例：[('hijacked','negative'),('left','negative'), . . .]

每个单词在列表中都只有正数或负数。

我要尝试的是使用for循环访问列表中的每个项。

for item in num:

        unique_word = item[0]
        temp = unique_word[0]
        temp1 = unique_word[1]
        frequency = item[1]

但是，在我访问数据之后，我想不出如何操作它。

( b)我使用了计数器()函数，并列出了以下列表：

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})

我现在面临的问题是如何比较“被劫持”这个词，否定的数字更高。因此，在新的名单中，“被劫持”应该是“否定的”，例如:例如: newList = [('hijacked','negative'),('left','negative'), . . .]

( c)或者也许我应该自己计算正负数，而不是使用most_common()函数或counter()。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”，并附带着积极和消极，我想我可以解决这个问题。

任何帮助都将不胜感激。

python

list

回答 2

Stack Overflow用户

回答已采纳

发布于 2015-06-22 02:03:08

from collections import Counter

counts = Counter(finalSentiment)

output = [] 
for word in set(w for w, s in finalSentiment):
    if counts.get((word, 'positive'), 0) > counts.get((word, 'negative'), 0):
        output.append((word, 'positive'))
    else:
        output.append((word, 'negative'))

票数 1

Stack Overflow用户

发布于 2015-06-22 02:57:26

from collections import Counter
finalSentiment = [('a','negative'),('a','negative'),('a','positive'),('b','positive')]
cnt = Counter(finalSentiment)
noDups = list(set([x[0] for x in set(finalSentiment)]))
newList =[]
for each in noDups:
    if cnt[(each,'positive')] > cnt[(each,'negative')]:
        newList.append((each,'positive'))
    else:
        newList.append((each,'negative'))

newList

[('a', 'negative'), ('b', 'positive')]

票数 0

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原文链接：

https://stackoverflow.com/questions/30971050

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