File "<string>", line 19, in <module> error is related to what?

[deanhystad]

__init__ not __int__. Hard to see because you often see what you expect to see, not what is really there.

If an attribute created in __init__() is not in the object, test if __init__() is called.

class Portfolio:
    def __int__(self):
        print("Enter __init__()")
        self.holdings = {}  #key = ticker, Value = number of shares
        print("Leave __init__()")

When I created a Portfolio object it didn't print anything. That means __init__() wasn't called. Knowing that it didn't take long to find the error.