Pure python BIP39 seed generator

seed_generator.py

import os
import hashlib


def new_seed() -> list:
    # https://raw.githubusercontent.com/bitcoin/bips/refs/heads/master/bip-0039/english.txt
    with open(os.path.join(os.path.dirname(__file__), 'bip39', 'english.txt'), "r") as f:
        wordlist = f.read().splitlines()

    entropy = os.urandom(16)  # 128 bit, 12 words
    checksum = hashlib.sha256(entropy).digest()
    entropy_with_checksum = entropy + checksum[:1]
    bits = "".join(f"{byte:08b}" for byte in entropy_with_checksum)
    words = [wordlist[int(bits[i:i + 11], 2)] for i in range(0, len(bits), 11)]

    return words