diff --git a/core/functions.ipynb b/core/functions.ipynb
index 577df28..9ec5d55 100644
--- a/core/functions.ipynb
+++ b/core/functions.ipynb
@@ -1,7 +1,7 @@
 {
  "metadata": {
   "name": "",
-  "signature": "sha256:1c8db5161bc70c65141de06823a3be29e8f58e1668a4090282d39002eabd8adb"
+  "signature": "sha256:a3a2ee34a40ca6d18902bc7ba52393ce71aa5dda1937d48cdd0db3044dc235bf"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -150,7 +150,7 @@
         "core.tests.test_transform_util.TestTransformUtil.test_remove_punctuation ... ok\r\n",
         "\r\n",
         "----------------------------------------------------------------------\r\n",
-        "Ran 3 tests in 0.002s\r\n",
+        "Ran 3 tests in 0.001s\r\n",
         "\r\n",
         "OK\r\n"
        ]
@@ -193,13 +193,13 @@
       {
        "metadata": {},
        "output_type": "pyout",
-       "prompt_number": 7,
+       "prompt_number": 4,
        "text": [
         "['f', 'b', 'fo', 'ba', 'foo', 'baz', 'bar,']"
        ]
       }
      ],
-     "prompt_number": 7
+     "prompt_number": 4
     },
     {
      "cell_type": "markdown",
@@ -238,7 +238,7 @@
        ]
       }
      ],
-     "prompt_number": 31
+     "prompt_number": 5
     },
     {
      "cell_type": "markdown",
@@ -266,7 +266,7 @@
      "language": "python",
      "metadata": {},
      "outputs": [],
-     "prompt_number": 34
+     "prompt_number": 6
     },
     {
      "cell_type": "code",
@@ -282,13 +282,56 @@
       {
        "metadata": {},
        "output_type": "pyout",
-       "prompt_number": 46,
+       "prompt_number": 7,
        "text": [
         "[False, True, False, False, False, False, False, True, True, True]"
        ]
       }
      ],
-     "prompt_number": 46
+     "prompt_number": 7
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "## \\*args, \\*\\*kwargs"
+     ]
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "\\*args and \\*\\*kwargs are useful when you don't know how many arguments might be passed to your function or to handle named arguments that you have not defined in advance."
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "def foo(func, arg, *args, **kwargs):\n",
+      "    print('arg: %s', arg)\n",
+      "    print('args: %s', args)\n",
+      "    print('kwargs: %s', kwargs)\n",
+      "    \n",
+      "    print('func result: %s', func(args))\n",
+      "\n",
+      "foo(sum, \"foo\", 1, 2, 3, 4, 5)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "('arg: %s', 'foo')\n",
+        "('args: %s', (1, 2, 3, 4, 5))\n",
+        "('kwargs: %s', {})\n",
+        "('func result: %s', 15)\n"
+       ]
+      }
+     ],
+     "prompt_number": 8
     }
    ],
    "metadata": {}