使用正则表达式清理电子表格

时间:2013-07-25 20:59:07

标签: python regex

我想删除以下每个条目中的所有统计信息:

#ChangeColumnFullTimeGraduatesEmployedAtGraduation:74.3%    #ChangeColumnAverageStartingSalaryAndBonus:$134,360 3.4 #ChangeColumnFullTimeGraduatesEmployedThreeMonthsAfterGraduation:81.4%  #ChangeColumnPeerAssessmentScoreOutOf5.:4.3
#ChangeColumnFullTimeGraduatesEmployedAtGraduation:82.0%    #ChangeColumnAverageStartingSalaryAndBonus:$127,368 3.29    #ChangeColumnFullTimeGraduatesEmployedThreeMonthsAfterGraduation:89.8%  #ChangeColumnPeerAssessmentScoreOutOf5.:4.1
#ChangeColumnFullTimeGraduatesEmployedAtGraduation:80.7%    #ChangeColumnAverageStartingSalaryAndBonus:$123,177 3.4 #ChangeColumnFullTimeGraduatesEmployedThreeMonthsAfterGraduation:92.5%  #ChangeColumnPeerAssessmentScoreOutOf5.:4.0

我一直在尝试使用正则表达式(正则表达式)。基于所需的最终输出包含不超过数字百分号/ $符号的事实,这就是我拼凑在一起的内容:

import re
import csv

with(open('sheet.csv','rU')) as f:

    for row in f:
        re.sub([^0-9\$\%],'',row)

返回此语法错误:

re.sub([^0-9\$\%],'',row)

1 个答案:

答案 0 :(得分:4)

正则从字符串解析正则表达式,使用字符串作为re.sub的参数,即

>>> re.sub(r'[^0-9\$\%]','',row)

或者你想要拆分:

>>> [c for c in re.split(r'[^0-9\$\%\.]',row) if c]
['74.3%', '$134', '360', '3.4', '81.4%', '5.', '4.3']

实际上它仍然不正确,因为您的列标签中有数字。如果您的输入看起来与您的示例完全相同,那么这样的事情可能会更好:

re.split(r'#[^:]+:|[ ,]',row)
'74.3%', '$134', '360', '3.4', '81.4%', '4.3'