如何忽略一個字段數據，同時比較兩個文件在python

Question

輸入文件，如下面的字段模式asMode|Date|Count|timestamp|status|insertTimeStamp

test1.txt: 
HR|06/08/2016|3000|Thu Jun 09 2016|Complete|20160627020300 
HR|06/08/2016|2000|Thu Jun 09 2016|Complete|20160627020400 
HR|06/08/2016|1000|Thu Jun 09 2016|Complete|20160627020500 
test2.txt: 
HR|06/08/2016|3010|Thu Jun 09 2016|Complete|20160627070300 
HR|06/08/2016|2000|Fri Jun 09 2016|Complete|20160627080300 
HR|06/08/2016|1500|Thu Jun 09 2016|Complete|20160627090300 

現在，我的要求是這兩個文件之間的差異線比較，但是它應該忽略insertTimeStamp字段（最後一列數據）進行比較。

我試過下面的代碼。它工作正常，但它的逐行比較。有人可以建議我怎麼能比較我的代碼跳過insertTimeStamp字段？

在此先感謝您的幫助。

import difflib 
import sys 

with open('/tmp/test1.txt', 'r') as hosts0: 
    with open('/tmp/test2.txt', 'r') as hosts1: 
     diff = difflib.unified_diff(
      hosts0.readlines(), 
      hosts1.readlines(), 
      fromfile='hosts0', 
      tofile='hosts1', 
      n=0, 
     ) 
     for line in diff: 
      for prefix in ('---', '+++', '@@'): 
       if line.startswith(prefix): 
        break 
      else: 
       sys.stdout.write(line[1:]) 

Answer 1

你可能只是切掉每行的最後一個元素，將它們傳遞到差速器功能

diff = difflib.unified_diff(
    ['|'.join(x.split('|')[:-1]) for x in hosts0.readlines()], 
    ['|'.join(x.split('|')[:-1]) for x in hosts1.readlines()], 
    fromfile='hosts0', 
    tofile='hosts1', 
    n=0, 
) 

行由行比較W/O使用difflib前：

with open('/tmp/test1.txt', 'r') as fh: 
    hosts1 = fh.readlines() 
with open('/tmp/test2.txt', 'r') as fh: 
    hosts2 = fh.readlines() 

for h1, h2 in zip(hosts1, hosts2): 
    if h1.split('|')[:-1] != h2.split('|')[:-1]: 
     print 'Lines are not the same!'