Added more test files from lectures.

BoundedInt.py

@@ -0,0 +1,52 @@
+class BoundedInt():
+    def __init__(self, i, min, max):
+        """
+        Create a bounded integer.
+
+        Args:
+            i (int): The initial value of the integer.
+            min (int): The minimum value of the integer.
+            max (int): The maximum value of the integer.
+        """
+        self.i = i
+        if i < min or i > max:
+            raise ValueError(f"{i} is outside the range of [{min}, {max}].")
+        self.min = min
+        self.max = max
+
+    def __int__(self):
+        return self.i
+
+    def __index__(self):
+        return self.i
+
+    def __getattr__(self, name):
+        print(f"DEBUG: {type(name)=}, {name=}")
+        return lambda *args, **kwargs: None
+
+    def __add__(self, y):
+        if isinstance(y, BoundedInt):
+            i = y.i
+        else:
+            i = y
+        if self.i + i > self.max:
+            raise ValueError()
+        else:
+            return BoundedInt(self.i + i, self.min, self.max)
+
+    def __sub__(self, y):
+        if isinstance(y, BoundedInt):
+            i = y.i
+        else:
+            i = y
+        if self.i - i < self.min:
+            raise ValueError()
+        else:
+            return BoundedInt(self.i - i, self.min, self.max)
+
+if __name__ == "__main__":
+    b1 = BoundedInt(1,0,2)
+    b2 = BoundedInt(1,0,2)
+    print(f"{b1.doo}")
+    b3 = b1+b2
+