Parser to remove dupe arch:all files and combine packages.i386 and packages.amd64 files

parse.py

#!/usr/bin/env python3
INPUT1 = 'Packages.i386'
INPUT2 = 'Packages.amd64'
OUTPUT = 'Packages.amd64i386'

known_all = set()

# open output
def parse_package(input_file,output_file):
    output_buffer = []
    for line in input_file:
        output_buffer.append(line)
        if line.startswith('Package:'): current_package = line.split('Package: ')[1]
        if line.startswith('Architecture:'):
            arch = line.split('Architecture: ')[1]
            if arch == 'all\n':
                if current_package in known_all:
                    dupe = True
                else:
                    dupe = False
                    known_all.add(current_package)
            else:
                dupe = False
        if line == '\n': # End of package
            if not dupe: 
                for x in output_buffer: output_file.write(x)
            output_buffer = []

with open(OUTPUT, 'w') as output:
    with open(INPUT1, 'r') as package_file:
        parse_package(package_file,output)
    with open(INPUT2, 'r') as package_file:
        parse_package(package_file,output)