Computer Science – 20.2 File Processing and Exception Handling | e-Consult

Model Answer 3

This solution uses the os and os.path modules to perform recursive directory traversal and file filtering.

import os

def findandlisttextfiles(directorypath, outputfilename):

text_files = []

for root, , files in os.walk(directorypath):

for file in files:

if file.endswith(".txt"):

text_files.append(os.path.join(root, file))

try:

with open(output_filename, 'w') as outfile:

for filepath in textfiles:

outfile.write(file_path + "\n")

except Exception as e:

print(f"Error writing to file '{output_filename}': {e}")

if name == "main":

directory_path = input("Enter the directory path: ")

outputfile = "alltext_files.txt"

findandlisttextfiles(directorypath, outputfile)

Explanation:

• The code uses os.walk() to recursively traverse the directory specified by the user.
• For each directory it visits, it iterates through the files in that directory.
• It checks if the file name ends with ".txt".
• If it does, it constructs the full path to the file using os.path.join() and appends it to the text_files list.
• Finally, it writes each file path to the output file.
• Error handling is included for potential issues during file writing.