Question

我有一个文本文件，它是一个带标签的元组（'neg'，'statements ......'），如下所示：

('neg', u'Without objection , approved .')
('posi', u'In intermeeting period , markets generally calm , investors perceived events generally positive outlook .')
('neg', u'Despite Committee \u2019 tightening policy August , yields fell across coupon curve , spreads narrowed , equities rose , asset markets continued exhibit unusually low volatility .')
('uncer', u'Despite Committee \u2019 tightening policy August , yields fell across coupon curve , spreads narrowed , equities rose , asset markets continued exhibit unusually low volatility .')
('neg', u'Despite Committee \u2019 tightening policy August , yields fell across coupon curve , spreads narrowed , equities rose , asset markets continued exhibit unusually low volatility .')
('uncer', u'Despite Committee \u2019 tightening policy August , yields fell across coupon curve , spreads narrowed , equities rose , asset markets continued exhibit unusually low volatility .')
('uncer', u'But forward rates falling gently time , apparently softer data more-tepid corporate outlooks caused market participants revise expected path monetary tightening .')
('uncer', u'But forward rates falling gently time , apparently softer data more-tepid corporate outlooks caused market participants revise expected path monetary tightening .')
('neg', u'But forward rates falling gently time , apparently softer data more-tepid corporate outlooks caused market participants revise expected path monetary tightening .')
('neg', u'The coupon curve also declined .')

我试图获得标签的长度，即元组列表中的'posi'，'neg'或'uncer'出现。

当我运行以下代码时，我得到了

negative= [(i, 'neg')for i in file_path if i not in i.split('neg')[:n_instances]]
print (len(negative))
positive=[(i, 'posi') for i in file_path if i not in i.split('posi')[:n_instances]]
print (len(positive))
uncertain=[(i, 'uncer') for i in file_path if i not in i.split('uncer')[:n_instances]]
print (len(negative), len(positive),len(uncertain))


**Output:** 
576
0
0
(576, 0, 0)

**Expected:**
576
333
599
(576,333,599)

我不确定为什么在运行代码时我会得到零长度？经过一系列的调试，我找到了解决方案：

SOLUTION：

file_path=open('~/20021106.csv', 'r')
#20040921.20090318.csv #20021106.csv

positive=[]
negative=[]
uncertain=[]
for i in file_path:
    if i not in i.split('posi'):
        positive.append((i, 'posi'))
    if i not in i.split('neg'):
        negative.append((i, 'neg'))
    if i not in i.split('uncer'):
        uncertain.append((i, 'uncer'))

print len(negative), len(positive),len(uncertain)

当另一个列表出现时，代码会跳过计算长度

0 个答案: