Python script to loop for files in subdirectories in order to change text and extension-CodePudding

I'm trying to loop through files in multiple subdirectories in order to : 1- Add some text inside the files (ending with .ext) 2- Change the extension of each file from .ext to .ext2

The script works fine when I have only one subdir in the main directory, but when I try to run the script on multiple subdirs it says: line 8, in with open(name, "r") as f: FileNotFoundError: [Errno 2] No such file or directory: "here the name of the subdir"

import os

directory = 'C:\\Users\\folder\\subfolders'

for dir, subdirs, files in os.walk(directory):
    for name in files:
        if name.endswith((".ext")):
            with open(name, "r") as f:
                XMLContent = f.readlines()
            XMLContent.insert(6, '<XMLFormat>\n')
            XMLContent.insert(40, '\n</XMLFormat>')

            with open(name, "w") as f:
                XMLContent = "".join(XMLContent)
                f.write(XMLContent)
            os.rename(os.path.join(dir, name), os.path.join(dir, name[:name.index('.ext')]  ".ext1"))

Above is a screenshot of the sub dirs I have in the folder (1.Modified).

CodePudding user response：

you need to pass the directory to open the file

with open(os.path.join(directory, name), "r") as f:

But, I think the best way is use the os.listdir() to loop in the directory

for item in os.listdir(directory):
    if item.endswith(".ext"):
        with open(os.path.join(directory, item), "r") as r:

CodePudding user response：

I've also created a new folder called all and put in it three folders and for each folder, I've created 2 files of .ext type.

So, I was able to write inside each file of them and change its name as well.

import os

for root, dirs, files in os.walk("/Users/ghaith/Desktop/test/all"):
    for file in files:
        if file.endswith('.ext'):
            path = root   '/'   file

            with open(path, "r") as f:
                content = f.readlines()

            content.insert(1, '<XMLFormat>\n')
            content.insert(3, '\n</XMLFormat>')

            with open(path, "w") as f:
                content = "".join(content)
                f.write(content)

            os.rename(path, path '2')

Output:

< XMLFormat >

< /XMLFormat >