Finds all capitalization permutations of a given word, and converts them all to Minecraft seeds

seed_permutations.py

def java_string_hashcode(s):
    # Convert string to seed
    # https://gist.github.com/hanleybrand/5224673
    h = 0
    for c in s:
        h = (31 * h + ord(c)) & 0xFFFFFFFF
    return ((h + 0x80000000) & 0xFFFFFFFF) - 0x80000000


def all_casings(input_string):
    # Recursively returns all capitalizations of a given word
    # https://stackoverflow.com/questions/6792803/finding-all-possible-case-permutations-in-python
    if not input_string:
        yield ""
    else:
        first = input_string[:1]
        if first.lower() == first.upper():
            for sub_casing in all_casings(input_string[1:]):
                yield first + sub_casing
        else:
            for sub_casing in all_casings(input_string[1:]):
                yield first.lower() + sub_casing
                yield first.upper() + sub_casing


def main(string):
    # Output can be used with https://github.com/Zodsmar/SeedSearcherStandaloneTool
    # to find good seeds for a given word.
    seeds = [s for s in all_casings(string)]
    with open("seeds.txt", "w") as outfile:
        for seed in seeds:
            outfile.write(str(java_string_hashcode(seed)) + "\n")
    with open("wordSeeds.txt", "w") as outfile:
        for seed in seeds:
            outfile.write(seed + "\n")


if __name__ == "__main__":
    base = input("Base word for all seeds: ")
    main(base)