पायथन difflib फ़ाइलों की तुलना

Question

मैं दो पाठ फ़ाइलों के लिए diff उत्पादन करने के लिए difflib का उपयोग करने की कोशिश कर रहा हूँ।

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 

यहाँ diff मैं कार्यक्रम से मिलता है:

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 

यहाँ new_tweets पाठ फ़ाइल है:

#!/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 

यहाँ PTITVProgs पाठ फ़ाइल है: यहाँ कोड है:

*** 
--- 
*************** 
*** 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 

जैसा कि आप दो स्रोत फ़ाइलों (PTITVProgs और new_tweets) की तेज़ी से तुलना करके देख सकते हैं कि उनके बीच का अंतर 7 ट्वीट्स 7 अप्रैल और 3 ट्वीट्स 3 अप्रैल पर 3 ट्वीट्स थे।

मैं बस new_tweets में लाइनों को चाहता हूं जो PTITVProgs में भिन्नता में दिखाई देने के लिए नहीं हैं।

लेकिन यह पाठ कि मैं देख नहीं करना चाहते का एक समूह फेंकता है। मुझे नहीं पता कि *** 1,7*** और *** 1,3*** के लिए diff आउटपुट स्टैंड में क्या है ...? केवल बदले गए लाइनों को पाने का उचित तरीका क्या है?

Answer 1

बस इस तरह diff के उत्पादन को पार्स (परिवर्तन '-' '+' करने के लिए यदि आवश्यक हो):

#!/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

कई diff शैलियां हैं और विभिन्न कार्यों difflib पुस्तकालय में उनके लिए मौजूद हैं। unified_diff, ndiff और context_diff।

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) 

आउटपुट::

1 
- 2   
    3   
    4   
    5 
+ 6 

संपादित करें:

आप कर सकते थे

आप लाइन नंबर के सारांश नहीं करना चाहते हैं, ndiff समारोह एक अलग शैली डेल्टा देता है यदि आप यही चाहते हैं तो केवल परिवर्तनों को निकालने के लिए भिन्नता को पार्स करें:

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

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