Uses Embit and qrcode modules generates ascii compact seed QR code.

seed_qr.py

"""Uses Embit and qrcode modules generates ascii compact seed QR code.
Install Embit:
pip install embit

Exemple: Words as input:
python seed_qr.py picture body actor coil end satoshi fish mom distance proof thank play fantasy friend dinner clump boring ozone review cart virtual toss foot infant
"""

import sys
from io import StringIO
from embit import bip39, bech32, ec
from embit.wordlists.bip39 import WORDLIST
from qrcode import QRCode

def _compact_seed_qr():
    # Krux code snippet
    words = mnemonic.split(" ")
    checksum_bits = 8 if len(words) == 24 else 4
    indexes = [WORDLIST.index(word) for word in words]
    bitstring = "".join([f"{bin(index)[2:]:0>11}" for index in indexes])[
        :-checksum_bits
    ]
    qr_data = int(bitstring, 2).to_bytes((len(bitstring) + 7) // 8, "big")

    # Prints ascii QR code
    qr_code = QRCode()
    qr_code.add_data(qr_data)
    qr_string = StringIO()
    qr_code.print_ascii(out=qr_string, invert=True)
    print("Compact Seed QR:")
    print(qr_string.getvalue())

if len(sys.argv) in (13, 25):
    mnemonic = " ".join(sys.argv[1:])
    _compact_seed_qr()
else:
    print("Inform a 12 or 24 BIP39 words seed")
    print(str(len(sys.argv) - 1) + " words were given")