Untitled

 # Finding the line with index as line number
    try:
        last_line_output = linecache.getline(vm_log_filename, last_line_no)
        print("Content for nth line :", last_line_output)
    except Exception as e:
        print("Exception while reading line from file:", e)
        return None

    filename = f"{vm_ip}-T{current_time}.txt"
    print(filename)

    X = int(old_line_number)  # Starting line number
    #print(f"Old Value is {X}")
    Y = int(last_line_no)  # Ending line number
    print(f'New Value is {Y}')

    try:
        with open(vm_log_filename, 'r') as input_file, open(filename, 'w') as output_file:
            # Using itertools.islice to copy lines between start and end indexes
            output_file.writelines(itertools.islice(input_file, X - 1, Y))
    except Exception as e:
        print("Exception while copying lines to file:", e)
        return None

    # Updating the last index in a Bookmark File
    print("Updating the last index in a Bookmark File")
    bookmark_record = syslog_record
    print(f"Bookmark Record for {i} is {bookmark_record}")
    print(f"Updating Bookmark record for {bookmark_record}")
    updated_bookmark_rec = f"{bookmark_record}{last_line_no}\n"
    print(updated_bookmark_rec)

    try:
        with open(bookmark_file, 'r+') as file:
            lines = file.readlines()
            file.seek(0)
            for line_no, line in enumerate(lines):
                if bookmark_record in line:
                    lines[line_no] = updated_bookmark_rec
            file.seek(0)
            file.writelines(lines)