Sliding window decoder for xor cipher

Sliding-window-xor.py

key_length = 0
partial_text = ""
decoded_text = bytes.fromhex("")

def xor_text(key, text):
    enc_array = []
    for i in range(len(text)):
        enc_array.append(text[i] ^ key[i % len(key)])

    return bytes(bytearray(enc_array))

for i in range(len(decoded_text)-len(partial_text)):

    shifted_text = decoded_text[i:] + decoded_text[:i]
    recovered_key = xor_text(partial_text.encode(), shifted_text[:len(partial_text)])
    shift_back_amount = i % key_length
    recovered_key = recovered_key[-shift_back_amount:] + recovered_key[:-shift_back_amount]
    
    print(f"trying key: {recovered_key.hex()}")
    print(f"plain text: {xor_text(recovered_key, decoded_text)}")