Apr-15-2020, 11:19 AM
The interpreter does not know where to find the function evaluate. In line 6 of the posted code (probably line 101 or so in your real code) print(evaluate... needs to be
The way you have it, evaluate(mystack) would call evaluate on the entire class object, functions and all. You don't want to do that. Call mystack.evaluate() on the data you want evaluate() to act upon.
print(mystack.evaluate(x))which brings up another issue. Not clear to me from your code what you call evaluate on - what is spaces? Is it supposed to be the input string?
The way you have it, evaluate(mystack) would call evaluate on the entire class object, functions and all. You don't want to do that. Call mystack.evaluate() on the data you want evaluate() to act upon.