Python Encrypt/Decrypt witht bcrypt

import requests
from Crypto import Random
from Crypto.Cipher import AES
import base64

class Toolbox():
    def __init__(self):
        """
            Provides peripheral & reusable functions for the app
        """
        self.ENCRYPTION_KEY = '40c8c33c-6733-4244-bdd8-e118e0e8'.encode()

    def encrypt( self, raw_text ):
        """
            Encrypts a string using bcrypt algorithm
            @raw_text is data to be encrypted
            returns bcrypt encrypted text
        """
        # - AES requires its bnlocks to be of size mod 16
        # - However we don't want unusable characters in a password
        # - First Pipe "|" delimits the end of the password
        if len(raw_text)%16 != 0:
            raw_text = raw_text+"|"
        # - Then Tilde "~" acts as padding.
        while len(raw_text)%16 != 0:
            raw_text = raw_text+"~"
        raw_text = raw_text.encode()
        # Generate a new random block
        random_block = Random.new().read( AES.block_size )
        # Encrypt plain text with a key and hash
        cipher = AES.new( self.ENCRYPTION_KEY, AES.MODE_CBC, random_block )
        text_cipher = cipher.encrypt( raw_text )
        block_and_cipher = random_block + text_cipher
        b64_cipher = base64.b64encode( block_and_cipher )
        return b64_cipher

    def decrypt( self, encrypted_text ):
        """
            Decrypts into text using bcrypt algorithm
            @encrypted_text:Input is a bcrypt encrypted block
            returns raw text
        """
        encrypted_text = base64.b64decode(encrypted_text)
        iv = encrypted_text[:16]
        try:
            cipher = AES.new(self.ENCRYPTION_KEY, AES.MODE_CBC, iv )
        except:
            self.cleanPrint("Decryption error","error")
            return

        # - To compensate for delimeter/padding above, we rstrip
        # - the excess & remove the padding
        decrypt_msg = cipher.decrypt(encrypted_text[16:])
        decrypt_msg = decrypt_msg.decode()
        decrypt_msg = decrypt_msg.rstrip("~")
        decrypt_msg = decrypt_msg.rstrip("|")
        return decrypt_msg

def main():
    tlbx = Toolbox()
    raw_String = "how now brown cow"
    print(raw_String)
    enc = tlbx.encrypt(raw_String)
    print(enc)
    dec = tlbx.decrypt(enc)
    print(dec)

if __name__ == '__main__':
    main()