cut_before_markers

#!/usr/bin/env python3
# Filename: cut_before_markers.py
# Version: 1.00
# Author: Jeoi Reqi

"""
This script cuts text before specified markers in each line of a text file.

Requirements:
- Python 3.x

Usage:
1. Ensure the script 'cut_before_markers.py' is in the same directory as the input text file.
2. Open the script in a text editor and edit the value of 'file_path' variable to point to the input text file.
3. Run the script using a Python interpreter.
4. The script will cut text before specified markers in each line of the input file and save the modified text back to the same file.
5. Review the console output to confirm the successful execution of the script.
"""

def remove_before_marker(line, marker):
    """
    Remove text before the specified marker in a line.

    Args:
        line (str): The input line.
        marker (str): The marker to cut the line before.

    Returns:
        str: The modified line without text before the marker.
    """
    index = line.find(marker)
    if index != -1:
        return line[index + len(marker):] + '\n'
    return line

file_path = 'input_file.txt'  # Path to the input file
output_lines = []  # List to store modified lines

try:
    with open(file_path, 'r') as file:
        for line in file:
            # Remove text before the specified marker in each line
            modified_line = remove_before_marker(line, " : ")  # Edit this to your set marker
            output_lines.append(modified_line)

    with open(file_path, 'w') as file:
        # Write modified lines back to the input file
        file.writelines(output_lines)

    print("Characters before '**' marker have been removed from 'input_file.txt'.")
except Exception as e:
    print("An error occurred:", e)