Python alphanumeric/natural sort

sort.py

import re
import unicodedata

# Case insensitivity

sorted(["Hola", "hello"])
# => ['Hola', 'hello']

sorted(
    ["Hola", "hello"],
    key=str.lower,
)
# => ['hello', 'Hola']

# Accents insensitivity

sorted(["élodie", "francis"])
# => ['francis', 'élodie']

sorted(
    ["élodie", "francis"],
    key=lambda item: unicodedata.normalize("NFKD", item).encode("ASCII", "ignore"),
)
# => ['élodie', 'francis']

# Alphanumeric

sorted(["file1", "file11", "file100", "file25", "file2"])
# => ['file1', 'file100', 'file11', 'file2', 'file25']

sorted(
    ["file1", "file11", "file100", "file25", "file2"],
    key=lambda item: [int(part) if part.isdigit() else part for part in re.split(r"(\d+)", item)],
)
# => ['file1', 'file2', 'file11', 'file25', 'file100']

# Everything together

sorted(["file1", "FILE11", "file100", "file25", "file2", "photo_château_fort_2", "photo_chateau_FORT_1"])
# => ['FILE11', 'file1', 'file100', 'file2', 'file25', 'photo_chateau_FORT_1', 'photo_château_fort_2']

sorted(
    ["file1", "FILE11", "file100", "file25", "file2", "photo_château_fort_2", "photo_chateau_FORT_1"],
    key=lambda item: [
        int(part) if part.isdigit() else unicodedata.normalize("NFKD", item).encode("ASCII", "ignore").lower()
        for part in re.split(r"(\d+)", item)
    ],
)
# => ['file1', 'file100', 'FILE11', 'file2', 'file25', 'photo_chateau_FORT_1', 'photo_château_fort_2']