ATM machine (deposits/withdrawals) using OOP

[knackwurstbagel]

When calling is_dunder() on various properties and objects, the Python REPL just says: “object not subscriptable” or “is not defined”. Is this expected?

Yes, I should have clarified that is_dunder() is just a helper for my print_properties function. It was not necessary to separate into its own function but I thought it might make the list comprehension more readable if I did not tack on that extra bit of code.

The entire purpose for my helper function was to illustrate to you that the BA instance does not have a transaction_time_id_format which is why you got the traceback on post #8

Sounds like now you have amended your code to instantiate TimeZone inside Account which will solve your problem. :)