Solution

app/main.py

@@ -1,58 +1,87 @@
+from __future__ import annotations
 from abc import ABC
 
 
 class IntegerRange:
-    def __init__(self, min_amount, max_amount):
-        self.min_amount = min_amount
+    def __init__(
+            self,
+            min_amount: int,
+            max_amount: int
+    ) -> None:
         self.max_amount = max_amount
+        self.min_amount = min_amount
 
-    def __set_name__(self, owner, name):
-        self.name = name
+    def __set_name__(self, owner: object, name: str) -> None:
+        self.protected_attr = "_" + name
 
-    def __get__(self, instance, owner):
-        return instance.__dict__.get(self.name)
+    def __set__(self, instance: object, value: int) -> None:
+        if not (self.max_amount >= value >= self.min_amount):
+            raise ValueError(
+                f""
+                f"Quantity should not be less than {self.max_amount} "
+                f"and greater than {self.min_amount}"
+            )
+        if not isinstance(value, int):
+            raise TypeError("Value should be integer.")
+        setattr(instance, self.protected_attr, value)
 
-    def __set__(self, instance, value):
-        if not (self.min_amount <= value <= self.max_amount):
-            raise ValueError(f"{self.name} must be between {self.min_amount} and {self.max_amount}")
-        instance.__dict__[self.name] = value
+    def __get__(self, instance: object, owner: object) -> int:
+        return getattr(instance, self.protected_attr)
 
 
 class Visitor:
-    def __init__(self, name, age, weight, height):
+    def __init__(
+            self,
+            name: int,
+            age: int,
+            weight: int,
+            height: int
+    ) -> None:
         self.name = name
         self.age = age
         self.weight = weight
         self.height = height
 
 
 class SlideLimitationValidator(ABC):
-    def __init__(self, age_range, weight_range, height_range):
-        self.age = IntegerRange(*age_range)
-        self.weight = IntegerRange(*weight_range)
-        self.height = IntegerRange(*height_range)
+    def __init__(
+            self,
+            age: int,
+            weight: int,
+            height: int
+    ) -> None:
+        self.age = age
+        self.weight = weight
+        self.height = height
 
 
 class ChildrenSlideLimitationValidator(SlideLimitationValidator):
-    def __init__(self):
-        super().__init__((4, 14), (20, 50), (80, 120))
+    age = IntegerRange(4, 14)
+    height = IntegerRange(80, 120)
+    weight = IntegerRange(20, 50)
 
 
 class AdultSlideLimitationValidator(SlideLimitationValidator):
-    def __init__(self):
-        super().__init__((14, 60), (50, 120), (120, 220))
+    age = IntegerRange(14, 60)
+    height = IntegerRange(120, 220)
+    weight = IntegerRange(50, 120)
 
 
 class Slide:
-    def __init__(self, name, limitation_class):
+    def __init__(
+            self, name: str,
+            limitation_class: SlideLimitationValidator
+    ) -> None:
         self.name = name
-        self.limitation_class = limitation_class()
+        self.limitation_class = limitation_class
 
-    def can_access(self, visitor):
+    def can_access(self, visitor: Visitor) -> bool:
         try:
-            self.limitation_class.age.__set__(visitor, visitor.age)
-            self.limitation_class.weight.__set__(visitor, visitor.weight)
-            self.limitation_class.height.__set__(visitor, visitor.height)
-            return True
-        except ValueError:
+            self.limitation_class(
+                visitor.age,
+                visitor.weight,
+                visitor.height
+            )
+        except (ValueError, TypeError):
             return False
+        return True