![steem python.jpg](https://steemitimages.com/DQmS7joWnTrfYrcfJMu31hdmuQjhpST6FJuX5D5c18CkH2n/steem%20python.jpg)
Good evening Steem Scripters,

I had recently exercised what I like to call the nuclear option regarding my Ubuntu virtual machine when I began receiving NoneType errors. In other words, I completely blew away my VM and started from scratch. Well, in retrospect, that may have not been the least painful way I could have addressed the problem but resulted in a couple good things namely the upgrade of my OS and Python. Turns out it was the node that I was connecting that was having issues but that's unimportant now. 

What is important is I understand other Steem scripters may be having issues with the libraries and I wanted to share a prospective fix for one that seemed to assist in my issue. I was encountering errors when attempting to add a new key. I received the following error which I just duplicated. (b was a sample bytecode string I had generated but I was receiving the same upon using the related library function)

>aes = AES.new(b)
Traceback (most recent call last):
  File "stdin", line 1, in module
TypeError: new() missing 1 required positional argument: 'mode'

What was the fix you might ask? It took me a bit of investigating and I came accross the following page with info on the AES module:

https://pythonhosted.org/pycrypto/Crypto.Cipher.AES-module.html

Here is the function:

![](https://steemitimages.com/DQmZsss7Pu3TxwDunTrJVa4Ckf4oMsUf2hvNtgz6vzPrPiE/image.png)

Details

![](https://steemitimages.com/DQmZZfKJMzTVr9FQFLpd6EcAjQ81jkSAecaCjAJeQLJhXh5/image.png)

Notice the "Mode" parameter. Hmmm remember that error?

>mode (a MODE_* constant) - The chaining mode to use for encryption or decryption. Default is MODE_ECB.

If we examine the BIP38.py wallet script in the steembase directory, we will notice that the mode argument is absent. What if we were to add it? That's exactly what I did to both the encrypt and decrypt functions. After that, I was able to successful add the key and perform voting operations with python. Here is the line you will need to replace.

>    aes = AES.new(derived_half2,AES.MODE_ECB)

I will also note that, if my memory serves me, I had encountered issues with the requires file involving versioning of dependences (toml among them I think). If there is demand, I will look into creating an article for that as well.

Please, let me know if this helps you or, if there are any questions, feel free to drop a comment.
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