python读取txt文件并取其某一列数据

 数据

最尼玛 -6.70400012637
扰民 -6.49756445867
fuck... -6.32963390433
RNM -6.21861284426
wcnmlgb -5.96710044003
2.5: -5.90459648251
Fxxk -5.87247473641
MLP -5.87247473641
吃哑巴亏 -5.77120419579
IAQI -5.77107837123
MLGBD -5.69408191501
NNND -5.66228462641
MLGB. -5.60457743583

 代码

import codecs

f = codecs.open('BosonNLP_sentiment_score.txt', mode='r', encoding='utf-8')  # 打开txt文件，以‘utf-8’编码读取
line = f.readline()   # 以行的形式进行读取文件
list1 = []
list2 = []
while line:
    a = line.split()
    print(a)
    b = a[0]   # 这是选取需要读取的位数
    c = float(a[1])
    if c >= 0:
        list1.append(b)  # 将其添加在列表之中

    # list2.append(c)  # 将其添加在列表之中
    line = f.readline()


f.close()

out_positive = codecs.open('out_positiveBosonNLP_sentiment_score.txt', mode='w', encoding='utf-8')
# out_negative = codecs.open('out_negativeBosonNLP_sentiment_score.txt', mode='w', encoding='utf-8')
for i in list1:
    print(i)
    out_positive.write(i)
    out_positive.write('\n')

结果

最尼玛
扰民
fuck...
RNM
wcnmlgb
2.5:
Fxxk
MLP
吃哑巴亏
IAQI
MLGBD
NNND
MLGB.