Replace String in multiple text-files [SOLVED]

[AlphaInc]

Hello everybody,

In a previous post I got help to find a string in a text-file, replace it with an increasing number and save it:

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import re   target = "String"   def str_counter(match_object):     str_counter.count += 1     return str(str_counter.count) str_counter.count = 0   with open('input.txt', 'r') as file :   filedata = file.read()   filedata = re.sub(re.escape(target), str_counter, filedata)   a_file = open("input.txt", "w") text = filedata print(text, file=a_file) a_file.close()

Now I would like to expand this and do this for every txt-file inside a folder. Is there a way to go through the whole directory, open every file, replace the string with an increasing counter and then save it to the same file? With my posted code I am able to do this for the one specified file but I'd like to do this for every text-file.

[bowlofred]

Modify your code above to become a function. Have the function take the name of the file and operate on it.

Then use glob.glob or Path.iterdir() (or os.scandir) to get all the files in a directory that you want. Loop over them and pass the filenames or filepaths to your function.

[AlphaInc]

Modify your code above to become a function. Have the function take the name of the file and operate on it.

Then use glob.glob or Path.iterdir() (or os.scandir) to get all the files in a directory that you want. Loop over them and pass the filenames or filepaths to your function.

Sorry to be so annoying but how do i do this exactly?
I'm pretty new to python

[Axel_Erfurt]

As bowlofred already wrote, make a function and then call it for every txt file

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import os   folder_path = "/path/to/folder/" # your path               for root, dirs, files in os.walk(folder_path, topdown = False):    for name in files:       if name.endswith(".txt"):         file_name = os.path.join(root, name)         print(file_name)         #your_function(file_name) # call your function

[AlphaInc]

As bowlofred already wrote, make a function and then call it for every txt file

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import os   folder_path = "/path/to/folder/" # your path               for root, dirs, files in os.walk(folder_path, topdown = False):    for name in files:       if name.endswith(".txt"):         file_name = os.path.join(root, name)         print(file_name)         #your_function(file_name) # call your function

I tried to do it like this:

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#!/usr/bin/env python3   import os import re   folder_path = "/home/pi/Workspace/Case_02/" # your path   for root, dirs, files in os.walk(folder_path, topdown = False):    for name in files:       if name.endswith(".txt"):         file_name = os.path.join(root, name)   target = "Format"   def str_counter(match_object):     str_counter.count += 1     return str(str_counter.count) str_counter.count = 0   with open(file_name, 'r') as file :   filedata = file.read()   filedata = re.sub(re.escape(target), str_counter, filedata)   with open(file_name, 'w') as file:     file.write(filedata)

I set an example with three different files (Out_01.txt, Out_02.txt, Out_03.txt) but the changes to my file were only written to Out_03.txt.

Edit: I just needed to set the right amount of spaces per indentation level.

[Axel_Erfurt]

You did not create a function and your indentations are disastrous, try this

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import os import re    folder_path = "/home/pi/Workspace/Case_02/" # your path target = "Format"   def str_counter(match_object):     str_counter.count += 1     return str(str_counter.count) str_counter.count = 0   def  do_it(file_name):     with open(file_name, 'r') as file :         filedata = file.read()         print(filedata)                filedata = re.sub(re.escape(target), str_counter, filedata)               print(filedata)                with open(file_name, 'w') as file:             file.write(filedata)             file.close()           for name in os.listdir(folder_path):     if name.endswith(".txt"):         file_name = os.path.join(folder_path, name)         do_it(file_name)