Improve comparison of values and objects of list and copy of list

Author: pajanne

Diff for: Introduction_to_python_day_1_session_3.ipynb

@@ -270,9 +270,17 @@
     "x = [123, 54, 92, 87, 33]\n",
     "y = x[:] # y is a copy of x\n",
     "z = x\n",
+    "print(x)\n",
     "print(\"Are values of y and x the same?\", y == x)\n",
     "print(\"Are objects y and x the same?\", y is x)\n",
-    "print(\"Are objects y and x not the same?\", y is not x)\n",
+    "print(\"Are values of z and x the same?\", z == x)\n",
+    "print(\"Are objects z and x the same?\", z is x)\n",
+    "# Let's change x\n",
+    "x[1] = 23\n",
+    "print(x)\n",
+    "print(\"Are values of y and x the same?\", y == x)\n",
+    "print(\"Are objects y and x the same?\", y is x)\n",
+    "print(\"Are values of z and x the same?\", z == x)\n",
     "print(\"Are objects z and x the same?\", z is x)"
    ]
   },