蟒蛇difflib比较文件(python difflib comparing files)

2019-08-20 04:20发布

站内文章 / 移动开发
109 0 0

我试图用difflib产生差异包含鸣叫两个文本文件。 下面是代码： 

#!/usr/bin/env python

# difflib_test

import difflib

file1 = open('/home/saad/Code/test/new_tweets', 'r')
file2 = open('/home/saad/PTITVProgs', 'r')

diff = difflib.context_diff(file1.readlines(), file2.readlines())
delta = ''.join(diff)
print delta

这里是PTITVProgs文本文件： 

Watch PTI on April 6th (7) Dr Israr Shah at 10PM on Business Plus in "Talking Policy". Rgds #PTI
CORRECTION!! Watch PTI on April 6th (5) @Asad_Umar  at 8PM on ARY News. Rgds #PTI
Watch PTI on April 6th (5) @Asad_Umar  at 8PM on AAJ News (6) PTI vs PMLN at 8PM on NewsOne. Rgds #PTI
Watch PTI on April 6th (5) Asad Umar at 8PM on AAJ News (6) PTI vs PMLN at 8PM on NewsOne. Rgds #PTI
Watch PTI on April 6th (5) Waleed Iqbal at 8PM on Channel 5. Rgds #PTI
Watch PTI on April 6th (3) Dr Israr Shah at 10PM on PTV News. Rgds #PTI
Watch PTI on April 6th (4) Javed hashmi at 1PM on PTV News. Rgds #PTI
Watch PTI on April 6th (3) Imran Alvi at 1PM on AAJ News. Rgds #PTI
Watch PTI on April 6th (1) Dr @ArifAlvi, Andleeb Abbas and Ehtisham Ameer at 11PM on ARY News (2) Hamid Khan at 10PM on ATV. Rgds #PTI
Watch PTI on April 5th (1) Farooq Amjad Meer at 10:45PM on Dunya News. Rgds #PTI
Watch PTI on April 4th (4) Faisal Khan at 8PM on PTV News. Rgds #PTI
@FaisalJavedKhan
Watch PTI on April 4th (3) Faisal Khan at 11PM on ATV. Rgds #PTI
@FaisalJavedKhan
Watch PTI on April 4th (1) Dr Israr Shah at 8PM on Waqt News (2) Dr Arif Alvi at 9PM on PTV World. Rgds #PTI
@ArifAlvi
Watch PTI on April 3rd (12) Abrar ul Haq on 10PM on Dawn News (13) Shabbir Sial at 10PM on Channel5. Rgds #PTI
Watch PTI on April 3rd (11) Sadaqat Abbasi on 8PM on RohiTV. Rgds #PTI
Watch PTI on April 3rd (10) Dr Zarqa and Andleeb Abbas on 8PM on Waqt News. Rgds #PTI
Watch PTI on April 3rd (9) Fauzia Kasuri at 8PM on Din News. Rgds #PTI
Watch PTI on April 3rd (8) Mehmood Rasheed at 8PM on ARY News. Rgds #PTI
Watch PTI on April 3rd (7) Israr Abbasi (Repeat on Arp 4th) at 1:20AM and 1PM on Vibe TV. Rgds #PTI
Watch PTI on April 3rd (5) Rao Fahad at 9PM on Express News (6) Dr Seems Zia at 10:30PM on Health TV. Rgds #PTI

这里是new_tweets文本文件： 

Watch PTI on April 7th (3) Malaika Reza at 8PM on AAJ News (4) Shah Mehmood Qureshi at 8PM on Geo News. Rgds #PTI
Watch PTI on April 7th (2) Chairman IMRAN KHAN at 10PM on PTV News in News Night with Sadia Afzal, Rpt: 2AM, 2PM. Rgds #PTI
@ImranKhanPTI
Watch PTI on April 7th (1) Dr Waseem Shahzad NOW at 6PM on PTV News. Rgds #PTI
Watch PTI on April 6th (7) Dr Israr Shah at 10PM on Business Plus in "Talking Policy". Rgds #PTI
CORRECTION!! Watch PTI on April 6th (5) @Asad_Umar  at 8PM on ARY News. Rgds #PTI
Watch PTI on April 6th (5) @Asad_Umar  at 8PM on AAJ News (6) PTI vs PMLN at 8PM on NewsOne. Rgds #PTI
Watch PTI on April 6th (5) Asad Umar at 8PM on AAJ News (6) PTI vs PMLN at 8PM on NewsOne. Rgds #PTI
Watch PTI on April 6th (5) Waleed Iqbal at 8PM on Channel 5. Rgds #PTI
Watch PTI on April 6th (3) Dr Israr Shah at 10PM on PTV News. Rgds #PTI
Watch PTI on April 6th (4) Javed hashmi at 1PM on PTV News. Rgds #PTI
Watch PTI on April 6th (3) Imran Alvi at 1PM on AAJ News. Rgds #PTI
Watch PTI on April 6th (1) Dr @ArifAlvi, Andleeb Abbas and Ehtisham Ameer at 11PM on ARY News (2) Hamid Khan at 10PM on ATV. Rgds #PTI
Watch PTI on April 5th (1) Farooq Amjad Meer at 10:45PM on Dunya News. Rgds #PTI
Watch PTI on April 4th (4) Faisal Khan at 8PM on PTV News. Rgds #PTI
@FaisalJavedKhan
Watch PTI on April 4th (3) Faisal Khan at 11PM on ATV. Rgds #PTI
@FaisalJavedKhan
Watch PTI on April 4th (1) Dr Israr Shah at 8PM on Waqt News (2) Dr Arif Alvi at 9PM on PTV World. Rgds #PTI
@ArifAlvi
Watch PTI on April 3rd (12) Abrar ul Haq on 10PM on Dawn News (13) Shabbir Sial at 10PM on Channel5. Rgds #PTI
Watch PTI on April 3rd (11) Sadaqat Abbasi on 8PM on RohiTV. Rgds #PTI
Watch PTI on April 3rd (10) Dr Zarqa and Andleeb Abbas on 8PM on Waqt News. Rgds #PTI
Watch PTI on April 3rd (9) Fauzia Kasuri at 8PM on Din News. Rgds #PTI

这里是我DIFF从程序得到： 

*** 
--- 
***************
*** 1,7 ****
- Watch PTI on April 7th (3) Malaika Reza at 8PM on AAJ News (4) Shah Mehmood Qureshi at 8PM on Geo News. Rgds #PTI
- Watch PTI on April 7th (2) Chairman IMRAN KHAN at 10PM on PTV News in News Night with Sadia Afzal, Rpt: 2AM, 2PM. Rgds #PTI
- @ImranKhanPTI
- Watch PTI on April 7th (1) Dr Waseem Shahzad NOW at 6PM on PTV News. Rgds #PTI
  Watch PTI on April 6th (7) Dr Israr Shah at 10PM on Business Plus in "Talking Policy". Rgds #PTI
  CORRECTION!! Watch PTI on April 6th (5) @Asad_Umar  at 8PM on ARY News. Rgds #PTI
  Watch PTI on April 6th (5) @Asad_Umar  at 8PM on AAJ News (6) PTI vs PMLN at 8PM on NewsOne. Rgds #PTI
--- 1,3 ----
***************
*** 21,24 ****
  Watch PTI on April 3rd (12) Abrar ul Haq on 10PM on Dawn News (13) Shabbir Sial at 10PM on Channel5. Rgds #PTI
  Watch PTI on April 3rd (11) Sadaqat Abbasi on 8PM on RohiTV. Rgds #PTI
  Watch PTI on April 3rd (10) Dr Zarqa and Andleeb Abbas on 8PM on Waqt News. Rgds #PTI
! Watch PTI on April 3rd (9) Fauzia Kasuri at 8PM on Din News. Rgds #PTI--- 17,23 ----
  Watch PTI on April 3rd (12) Abrar ul Haq on 10PM on Dawn News (13) Shabbir Sial at 10PM on Channel5. Rgds #PTI
  Watch PTI on April 3rd (11) Sadaqat Abbasi on 8PM on RohiTV. Rgds #PTI
  Watch PTI on April 3rd (10) Dr Zarqa and Andleeb Abbas on 8PM on Waqt News. Rgds #PTI
! Watch PTI on April 3rd (9) Fauzia Kasuri at 8PM on Din News. Rgds #PTI
! Watch PTI on April 3rd (8) Mehmood Rasheed at 8PM on ARY News. Rgds #PTI
! Watch PTI on April 3rd (7) Israr Abbasi (Repeat on Arp 4th) at 1:20AM and 1PM on Vibe TV. Rgds #PTI
! Watch PTI on April 3rd (5) Rao Fahad at 9PM on Express News (6) Dr Seems Zia at 10:30PM on Health TV. Rgds #PTI

正如你可以快速地比较两个源文件（PTITVProgs和new_tweets）它们之间的区别是3个鸣叫是4月7日和4月3日3个鸣叫看到。

我只是想在行new_tweets不在PTITVProgs出现在差异。

但它抛出了一堆，我不希望看到的文字。 我不知道是什么*** 1,7***和*** 1,3***在diff的输出代表...？ 什么是正确的方式只拿到了更改的行？

Answer 1:

： - （如果需要的“+”变“”）只是分析差异的输出这样

#!/usr/bin/env python

# difflib_test

import difflib

file1 = open('/home/saad/Code/test/new_tweets', 'r')
file2 = open('/home/saad/PTITVProgs', 'r')

diff = difflib.ndiff(file1.readlines(), file2.readlines())
delta = ''.join(x[2:] for x in diff if x.startswith('- '))
print delta


Answer 2:

有多种风格的差异，并在他们存在不同的功能difflib库。 unified_diff ， ndiff和context_diff 。

如果你不想让行号汇总， ndiff功能给出了迥异风格三角洲： 

import difflib

f1 = '''1
2
3
4
5'''
f2 = '''1
3
4
5
6'''

diff = difflib.ndiff(f1,f2)

for l in diff:
    print(l)

输出： 

  1
- 2          
  3          
  4          
  5   
+ 6

编辑：

你也可以解析DIFF只提取变化，如果这就是你想要的东西： 

>>>changes = [l for l in diff if l.startswith('+ ') or l.startswith('- ')]

>>>for c in changes:
       print(c)
>>>
- 2
+ 6


文章来源: python difflib comparing files
标签： python text difflib
举报

收藏的人(0)

Ta的文章 更多文章
登录 后发表评论
0条评论
还没有人评论过~