Better python default sample for demo

Author: tmr232

src/demo/src/assets/demo.py

@@ -0,0 +1,13 @@
+def f():
+    try:
+        linux_interaction()
+    except RuntimeError as error:
+        print(error)
+    else:
+        try:
+            with open("file.log") as file:
+                read_data = file.read()
+        except FileNotFoundError as fnf_error:
+            print(fnf_error)
+    finally:
+        print("Cleaning up, irrespective of any exceptions.")