打印python difflib文件中的行數

Question

我正試圖在Python中使用difflib來查找2個文本文件之間的差異。我可以打印新文件中添加或刪除的文本。但是我想打印在哪一行進行了修改。即使我知道如何計算文件中的行數，我無法打印已添加或刪除的行。我的代碼是在這裏：

import difflib 
import time 


def get_diff(old_file, new_file): 
    f1 = open(old_file, 'r') 
    f2 = open(new_file, 'r') 

    old_file = f1.readlines() 
    new_file = f2.readlines() 

    diff = difflib.unified_diff(old_file, new_file, lineterm='') 
    lines = list(diff)[2:] 
    added = [lineA for lineA in lines if lineA[0] == '+'] 


    with open("output.txt", "w") as fh1: 
    for line in added: 
     fh1.write(line) 
    print '+',added 
    removed = [lineB for lineB in lines if lineB[0] == '-'] 
    with open("output.txt", "a") as fh1: 
    for line in removed: 
     fh1.write(line) 
    print '-',removed 


if __name__ == '__main__': 
    fh = get_diff("ex.txt","ex2.txt") 

預先感謝您:)

Answer 1

的unified diff已經包含了不同行的信息：

--- before.py 
+++ after.py 
@@ -1,4 +1,4 @@ 
-bacon 
-eggs 
-ham 
+python 
+eggy 
+hamster 
guido 

第三行@@ -1,4 +1,4 @@告訴你的改變的位置。