Calculate stack value's

[Yoriz]

I was going to try and explain how you could go about doing it and point you in a direction.
Explaining would be hard work, so see the following code and ask questions about any of it that doesn't makes sense.

Using the operator module create a symbol dict.

import operator

symbol_dict = {'+': operator.add, '-': operator.sub,
               '*': operator.mul, '/': operator.truediv}

Add the following method that makes use of the symbol dict

    def calculate_stack(self):
        if self.is_empty():
            return 0
        items = self.get_stack()
        total = items[0]
        symbol = None

        for item in items[1:]:
            if symbol:
                total = symbol_dict[symbol](total, item)
                symbol = None
            elif item in ("+", "-", "*", "/"):
                symbol = item

        return total

Full code

import operator

symbol_dict = {'+': operator.add, '-': operator.sub,
               '*': operator.mul, '/': operator.truediv}


class stack():
    def __init__(self):
        self.items = []

    def push(self, item):
        self.items.append(item)

    def pop(self):
        return self.items.pop()

    def get_stack(self):
        return self.items

    def is_empty(self):
        return self.items == []

    def is_full(self):
        return self.items == [1]

    def size(self):
        return len(self.items)

    def calculate_stack(self):
        if self.is_empty():
            return 0
        items = self.get_stack()
        total = items[0]
        symbol = None

        for item in items[1:]:
            if symbol:
                total = symbol_dict[symbol](total, item)
                symbol = None
            elif item in ("+", "-", "*", "/"):
                symbol = item

        return total


s = stack()
print("ar stack tuscias?")
print(s.is_empty())
print("ar stack pilnas?")
print(s.is_full())
s.push(9)
s.push('+')
s.push(5)
s.push('+')
s.push(8)
s.push('+')
s.push(7)
s.push('+')
s.push(3)
print(s.size())
print(s.get_stack())


print(s.calculate_stack())
s2 = stack()
s2.push(2)
s2.push('*')
s2.push(4)
s2.push('-')
s2.push(1)
print(s2.calculate_stack())

Output:
ar stack tuscias?
True
ar stack pilnas?
False
9
[9, '+', 5, '+', 8, '+', 7, '+', 3]
32
7