I have a script that an argument is being passed from the automation program so I know there are no issues with the wrong file being passed. I am running into an issue that if the argument matches a filename it needs to add a suffix but it looks like it is not adding the suffix because all files default to the else of the if statement and I cant figure out why.

import sys

# Constants
WF = "C:\USERS\bob\Desktop\paymentfiles\bob.txt"
SUFFIX = 'N'
DESIRED_LENGTH_WF = 87
DESIRED_LENGTH_OTHER = 88
# Get the filename from command line argument
filename = sys.argv[1]

def reformat_file(filename):
    # Determine the desired length based on the filename
    desired_length = DESIRED_LENGTH_WF if filename == WF else DESIRED_LENGTH_OTHER
    # Read the file
    with open(filename, 'r') as file:
        lines = file.readlines()
    # Reformat each line
    with open(filename, 'w') as file:
        for line in lines:
            line = line.strip()
            if filename == WF:
                # Add suffix 'N' for WF file
                line = line.ljust(desired_length - 1) + SUFFIX
            else:
                # No suffix for other files
                line = line.ljust(desired_length)
            file.write(line + 'n')

if __name__ == "__main__":
    reformat_file(filename)

if the filename is equal it is not adding the suffix. Any help you can provide would be great. I have manually passed the argument to ensure it is not being sent incorrectly with same results.

passing correct argument