The Python standard library has a module specifically for the purpose of finding diffs between strings/files. To get a diff using the difflib library, you can simply call the united_diff function on it.
For example, Lets say you have 2 files, file1 and file2 with the following content:
file1: Hello People of the world file2: Hello People from India
Now to take their diff use the following code:
import difflib with open('file1') as f1: f1_text = f1.read() with open('file2') as f2: f2_text = f2.read() # Find and print the diff: for line in difflib.unified_diff(f1_text, f2_text, fromfile='file1', tofile='file2', lineterm=''): print line
This will give the output:
--- file1 +++ file2 @@ -1,5 +1,4 @@ Hello People -of -the -world +from +India