如何让Python读取多个txt文件

Question

I need help with this Python Script
I am a noob to Python, but I really need this to work

I made a batch script for this project and it works great, BUT it's very slow it can take 30 minutes to edit all 200 + files

This is what I have and this works great but I have over 200 txt files with different names and all located in different folders

f1 = open('(1).txt', 'r')
f2 = open('(1A).txt', 'w')
for line in f1:
    f2.write(line.replace('"aplid": 2147483648', '"aplid": -2147483648'))
f1.close()
f2.close()

What I need is for this to work like this, so I have 2 codes per txt file that needs to be edited if this is to much to ask help on then I'll just make 2 copies of the same script one for each code

I made a call sub reader with batch to run the python.py script but it runs slow when using the batch script, so it would be great to make this this script have it's own sub folder reader

import glob
import os

for f in glob.glob("*.txt"):
f1 = open('f', 'r')
f2 = open('f', 'w')
for line in f1:
    f2.write(line.replace('"aplid": 2147483648,', '"aplid": -2147483648,'))
    f2.write(line.replace('"orlid": 2147483648,', '"orlid": -2147483648,'))
f1.close()
f2.close()

If it can read and write to the same files that would be great
I don't know if Python can read Folders and subfolders like batch dir /b /s /ad

But my main interest is for this to read any txt file and save to the same txt file

I'm sorry for bothering you'll, but I searched online and I can't find anything that helps with this and most of it I don't understand

I keep reading that using a path can help, but this script is going to be placed in several computers so using path is not best

Answer 1

You can use os.walk to traverse through a directory tree:

import os

for root, dirs, files in os.walk('.'):
    for name in files:
        nmin = os.path.join(root,name)
        with open(nmin,"r") as fin:
            data = fin.read()
        data = data.replace('"aplid": 2147483648,', '"aplid": -2147483648,') \
                   .replace('"orlid": 2147483648,', '"orlid": -2147483648,')
        with open(nmin,"w") as fout:
            fout.write(data)