Unique Random ID on Table

[talius]

Hi all,
I'm new using Python and need help from you. I use pycharm to write code.
I need to generate an unique Random ID for each transaction i create using the following table:

My table contains:
Date
Name
Address
Code --> It will be alphanumeric (between 5 to 7 length with may be special characters)
Transaction type..

Could you please assist to make it simple?

Thanks

T