Update GitHub repo links in a directory

example-log.txt

[jack@arch]$ ls -R testdir
testdir:
a.txt  testdir2

testdir/testdir2:
b.txt
[jack@arch]$ cat testdir/a.txt 
def
[jack@arch]$ cat testdir/testdir2/b.txt 
def123
[jack@arch]$ python replacelinks.py 
Target directory? : testdir
Current text? : def
Desired text? : abc
Wrote to testdir/a.txt .

Wrote to testdir/testdir2/b.txt .

Target string replaced 2 times.

[jack@arch]$ cat testdir/a.txt 
abc
[jack@arch]$ cat testdir/testdir2/b.txt 
abc123

replacelinks.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import zipfile, os, re

def init():
    dirname = input("Target directory? : ")
    from_str = input("Current text? : ")
    to_str = input("Desired text? : ")
    reps = 0
    for sd, ds, fs in os.walk(dirname):
        for file in fs:
            fp = sd + os.sep + file
            fr = open(fp, "r")
            fcont = fr.read()
            fr.close()
            fw = open(fp, "w")
            fw.write(fcont.replace(from_str, to_str))
            fw.close()
            fr = open(fp, "r")
            fcont2 = fr.read()
            fr.close()
            if fcont != fcont2:
                reps += 1
                print("Wrote to", fp, ".\n")
            else:
                print("Target string not found in", fp, ".\n")
    print("Target string replaced", reps, "times.\n")
init()