Merge and parse WiiU key files

WiiUKeyMerger.py

# Instructions
# Run: python WiiKeyMerger.py file1.txt file2.txt
import os
import sys

OUTPUT_FILE = "merged_keys.txt"


def parse_and_remove_duplicates(file1, file2):
    if os.path.exists(OUTPUT_FILE):
        os.remove(OUTPUT_FILE)

    with open(file1, 'r') as f1, open(file2, 'r') as f2, open(OUTPUT_FILE, 'a') as result:
        output = dict()
        data1 = f1.read()
        data2 = f2.read()
        concatenated = data1 + '\n' + data2
        for item in concatenated.split('\n'):
            split = item.split('#')
            if len(split) == 2:
                hs = split[0].strip().lower()
                comment = split[1].strip()
            else:
                hs = split[0].strip()
                comment = ''
            if hs not in output:
                output[hs] = comment
        # Sort by comments
        output = dict(sorted(output.items(), key=lambda item: item[1]))

        for item in output:
            result.write(item + ' # ' + output[item] + '\n')


if __name__ == '__main__':
    parse_and_remove_duplicates(sys.argv[1], sys.argv[2])