Automated rollback of commit 3050034

PiperOrigin-RevId: 404369679

Author: MarkDaoust

site/en/guide/function.ipynb

@@ -1166,10 +1166,9 @@
         "correct_a = leaky_function(tf.constant(1))\n",
         "\n",
         "print(correct_a.numpy())  # Good - value obtained from function's returns\n",
-        "try:\n",
+        "with assert_raises(AttributeError):\n",
         "  x.numpy()  # Bad - tensor leaked from inside the function, cannot be used here\n",
-        "except AttributeError as expected:\n",
-        "  print(expected)"
+        "print(x)"
       ]
     },
     {
@@ -1198,10 +1197,9 @@
         "correct_a = leaky_function(tf.constant(1))\n",
         "\n",
         "print(correct_a.numpy())  # Good - value obtained from function's returns\n",
-        "try:\n",
+        "with assert_raises(AttributeError):\n",
         "  x.numpy()  # Bad - tensor leaked from inside the function, cannot be used here\n",
-        "except AttributeError as expected:\n",
-        "  print(expected)\n",
+        "print(x)\n",
         "\n",
         "@tf.function\n",
         "def captures_leaked_tensor(b):\n",
@@ -1246,64 +1244,6 @@
         "  external_object.field = a  # Bad - leaks tensor"
       ]
     },
-    {
-      "cell_type": "markdown",
-      "metadata": {
-        "id": "g-XVQcD-wf5K"
-      },
-      "source": [
-        "### Recursive tf.functions are not supported\n",
-        "\n",
-        "Recursive `Function`s are not supported and could cause infinite loops. For example,"
-      ]
-    },
-    {
-      "cell_type": "code",
-      "execution_count": null,
-      "metadata": {
-        "id": "QSN-T1m5EFcR"
-      },
-      "outputs": [],
-      "source": [
-        "@tf.function\n",
-        "def recursive_fn(n):\n",
-        "  if n > 0:\n",
-        "    return recursive_fn(n - 1)\n",
-        "  else:\n",
-        "    return 1\n",
-        "\n",
-        "with assert_raises(Exception):\n",
-        "  recursive_fn(tf.constant(5))  # Bad - maximum recursion error."
-      ]
-    },
-    {
-      "cell_type": "markdown",
-      "metadata": {
-        "id": "LyRyooKGUxNV"
-      },
-      "source": [
-        "Even if a recursive `Function` seems to work, the python function will be traced multiple times and could have performance implication. For example,"
-      ]
-    },
-    {
-      "cell_type": "code",
-      "execution_count": null,
-      "metadata": {
-        "id": "7FlmTqfMUwmT"
-      },
-      "outputs": [],
-      "source": [
-        "@tf.function\n",
-        "def recursive_fn(n):\n",
-        "  if n > 0:\n",
-        "    print('tracing')\n",
-        "    return recursive_fn(n - 1)\n",
-        "  else:\n",
-        "    return 1\n",
-        "\n",
-        "recursive_fn(5)  # Warning - multiple tracings"
-      ]
-    },
     {
       "cell_type": "markdown",
       "metadata": {