feat: add task 2 calculator draft

task2/math_objects.py

@@ -0,0 +1,29 @@
+from collections import deque
+from typing import Literal, Self
+
+
+class Token[T]:
+    value: T
+
+    def __init__(self, value: T) -> None:
+        self.value = value
+
+class Integer(Token[int]):
+    @classmethod
+    def create_from_string(cls, string: str) -> Self:
+        return cls(int(string))
+
+type _OperatorType = Literal["+", "-", "*", "/"]
+
+class Operator(Token[_OperatorType]):
+    def __init__(self, value: Literal["+", "-", "*", "/"], precedence = 0) -> None:
+        super().__init__(value)
+        self.precedence: int = precedence
+
+type _Parentheses = Literal["(", ")"]
+
+class Parenthesis(Token[_Parentheses]):
+    pass
+
+# class Stack(MathObject[deque[MathObject]]):
+#     pass