Python: List All The File Names In A Directory And Its Subdirectories And Then Print The Results In A Txt File

My problem is as follows. I want to list all the file names in my directory and its subdirectories and have that output printed in a txt file. Now this is the code I have so far: i

Solution 1:

don't open a file in your for loop. open it before your for loop

like this

import os

a = open("output.txt", "w")
for path, subdirs, files in os.walk(r'C:\Users\user\Desktop\Test_Py'):
   for filename in files:
     f = os.path.join(path, filename)
     a.write(str(f) + os.linesep) 

Or using a context manager (which is better practice):

import os

withopen("output.txt", "w") as a:
    for path, subdirs, files in os.walk(r'C:\Users\user\Desktop\Test_Py'):
       for filename in files:
         f = os.path.join(path, filename)
         a.write(str(f) + os.linesep) 

Solution 2:

You are opening the file in write mode. You need append mode. See the manual for details.

change

a = open("output.txt", "w")

to

a = open("output.txt", "a")

Solution 3:

You can use below code to write only File name from a folder.

import os

a = open("output.txt", "w")
for path, subdirs, files in os.walk(r'C:\temp'):
   for filename in files:
      a.write(filename + os.linesep)