カタカナ・ひらがなを統一する

import unicodedata

HIRA_START = ord("ぁ")
HIRA_END = ord("ゖ")
KATA_START = ord("ァ")

def kata_to_hira(text: str) -> str:
    chars = []
    for ch in text:
        code = ord(ch)
        if KATA_START <= code <= ord("ヺ"):
            chars.append(chr(code - 0x60))
        else:
            chars.append(ch)
    return "".join(chars)

def hira_to_kata(text: str) -> str:
    chars = []
    for ch in text:
        code = ord(ch)
        if HIRA_START <= code <= HIRA_END:
            chars.append(chr(code + 0x60))
        else:
            chars.append(ch)
    return "".join(chars)

samples = ["ﾌｧﾐﾘｰﾏｰﾄ", "ファミリーマート", "ふぁみりーまーと"]
for s in samples:
    s_nfkc = unicodedata.normalize("NFKC", s)
    print(s_nfkc, "→", kata_to_hira(s_nfkc))