Added more test files from lectures.

test19.py

@@ -0,0 +1,14 @@
+class Hotdog:
+    count: float = 0
+    def __init__(self) -> None:
+        Hotdog.count += 1
+
+    @staticmethod
+    def get_count() -> int:
+        return Hotdog.count
+
+if __name__ == '__main__':
+    h1 = Hotdog()
+    print(Hotdog.get_count())
+    h2 = Hotdog()
+    print(Hotdog.get_count())