From 45deb26b74a377638b7a387e7154d97b2dbeb1b1 Mon Sep 17 00:00:00 2001
From: yukun-hh <zhangyukunhh@gmail.com>
Date: Tue, 30 Jun 2026 11:57:35 +0800
Subject: [PATCH] =?UTF-8?q?transformer=20encode=20=E5=9D=97=E5=AE=8C?=
 =?UTF-8?q?=E6=88=90?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 chapter10.ipynb | 697 +++++++++++++++++++++++++++++-------------------
 1 file changed, 419 insertions(+), 278 deletions(-)

diff --git a/chapter10.ipynb b/chapter10.ipynb
index cd1ba10..4c660b1 100644
--- a/chapter10.ipynb
+++ b/chapter10.ipynb
@@ -4,27 +4,36 @@
    "cell_type": "code",
    "id": "initial_id",
    "metadata": {
-    "collapsed": true,
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:42.541639835Z",
-     "start_time": "2026-05-29T15:19:40.265547407Z"
+     "end_time": "2026-06-30T02:59:03.101034703Z",
+     "start_time": "2026-06-30T02:58:59.676757575Z"
     }
    },
    "source": [
     "import torch\n",
     "from d2l import torch as d2l\n"
    ],
-   "outputs": [],
-   "execution_count": 2
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "/home/yukun/.conda/envs/nn/lib/python3.11/site-packages/torch/cuda/__init__.py:1007: UserWarning: Can't initialize NVML\n",
+      "  raw_cnt = _raw_device_count_nvml()\n"
+     ]
+    }
+   ],
+   "execution_count": 1
   },
   {
+   "cell_type": "code",
+   "id": "a0e3f725b7764f08",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:42.593785744Z",
-     "start_time": "2026-05-29T15:19:42.545273168Z"
+     "end_time": "2026-06-30T02:59:03.137220451Z",
+     "start_time": "2026-06-30T02:59:03.118596105Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "def show_heatmaps(matrices,xlabel,ylabel,titles=None,figsize=(2.5,2.5),cmap='Reds'):\n",
     "    d2l.use_svg_display()\n",
@@ -41,31 +50,30 @@
     "                ax.set_title(titles[j])\n",
     "    fig.colorbar(pcm,ax=axes,shrink=0.6)"
    ],
-   "id": "a0e3f725b7764f08",
    "outputs": [],
-   "execution_count": 3
+   "execution_count": 2
   },
   {
+   "cell_type": "code",
+   "id": "bb798de34fc4d0fa",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:42.832298248Z",
-     "start_time": "2026-05-29T15:19:42.594979091Z"
+     "end_time": "2026-06-30T02:59:03.336399820Z",
+     "start_time": "2026-06-30T02:59:03.139187972Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "attention_weights = torch.eye(10).reshape((1, 1, 10, 10))\n",
     "\n",
     "show_heatmaps(attention_weights, xlabel='Keys', ylabel='Queries')"
    ],
-   "id": "bb798de34fc4d0fa",
    "outputs": [
     {
      "data": {
       "text/plain": [
        "<Figure size 250x250 with 2 Axes>"
       ],
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@@ -74,48 +82,49 @@
      }
     }
    ],
-   "execution_count": 4
+   "execution_count": 3
   },
   {
+   "cell_type": "code",
+   "id": "a4070c75847fb887",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:42.925242334Z",
-     "start_time": "2026-05-29T15:19:42.844425757Z"
+     "end_time": "2026-06-30T02:59:03.393286045Z",
+     "start_time": "2026-06-30T02:59:03.339609950Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "n_train = 50\n",
     "x_train,_ = torch.sort(torch.rand(n_train)*5)"
    ],
-   "id": "a4070c75847fb887",
    "outputs": [],
-   "execution_count": 5
+   "execution_count": 4
   },
   {
+   "cell_type": "code",
+   "id": "2aca6952876d9cf5",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:42.978395734Z",
-     "start_time": "2026-05-29T15:19:42.926738710Z"
+     "end_time": "2026-06-30T02:59:03.465395938Z",
+     "start_time": "2026-06-30T02:59:03.397781049Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "def f(x):\n",
     "    return 2*torch.sin(x)+x**0.8"
    ],
-   "id": "2aca6952876d9cf5",
    "outputs": [],
-   "execution_count": 6
+   "execution_count": 5
   },
   {
+   "cell_type": "code",
+   "id": "ea7b94585dcde934",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:43.056742866Z",
-     "start_time": "2026-05-29T15:19:42.982949395Z"
+     "end_time": "2026-06-30T02:59:03.554188488Z",
+     "start_time": "2026-06-30T02:59:03.467856816Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "y_train = f(x_train)+torch.normal(0.0,0.5,(n_train,))\n",
     "x_test = torch.arange(0,5,0.1)\n",
@@ -123,7 +132,6 @@
     "n_test = len(x_test)\n",
     "n_test"
    ],
-   "id": "ea7b94585dcde934",
    "outputs": [
     {
      "data": {
@@ -131,51 +139,51 @@
        "50"
       ]
      },
-     "execution_count": 7,
+     "execution_count": 6,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
-   "execution_count": 7
+   "execution_count": 6
   },
   {
+   "cell_type": "code",
+   "id": "35c2403bbb5509cf",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:43.117629637Z",
-     "start_time": "2026-05-29T15:19:43.058324467Z"
+     "end_time": "2026-06-30T02:59:03.578849203Z",
+     "start_time": "2026-06-30T02:59:03.563506811Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "def plot_kernel_reg(y_hat):\n",
     "    d2l.plot(x_test, [y_truth, y_hat], 'x', 'y', legend=['Truth', 'Pred'],\n",
     "        xlim=[0, 5], ylim=[-1, 5])\n",
     "    d2l.plt.plot(x_train, y_train, 'o', alpha=0.5);"
    ],
-   "id": "35c2403bbb5509cf",
    "outputs": [],
-   "execution_count": 8
+   "execution_count": 7
   },
   {
+   "cell_type": "code",
+   "id": "f27ecb9c68aed894",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:43.224202029Z",
-     "start_time": "2026-05-29T15:19:43.119223163Z"
+     "end_time": "2026-06-30T02:59:03.728510578Z",
+     "start_time": "2026-06-30T02:59:03.580633476Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "y_hat = torch.repeat_interleave(y_train.mean(),n_test)\n",
     "plot_kernel_reg(y_hat)"
    ],
-   "id": "f27ecb9c68aed894",
    "outputs": [
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      },
      "metadata": {},
      "output_type": "display_data",
@@ -184,16 +192,17 @@
      }
     }
    ],
-   "execution_count": 9
+   "execution_count": 8
   },
   {
+   "cell_type": "code",
+   "id": "fa7579d7cd8bfcb7",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:43.317103476Z",
-     "start_time": "2026-05-29T15:19:43.225907041Z"
+     "end_time": "2026-06-30T02:59:03.807801559Z",
+     "start_time": "2026-06-30T02:59:03.732916546Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "from torch import nn\n",
     "X_repeat = x_test.repeat_interleave(n_train).reshape((-1, n_train))\n",
@@ -201,20 +210,16 @@
     "y_hat = torch.matmul(attention_weights,y_train)\n",
     "x_train,X_repeat,attention_weights"
    ],
-   "id": "fa7579d7cd8bfcb7",
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "(tensor([9.4801e-04, 5.2621e-02, 2.3643e-01, 2.9541e-01, 3.2529e-01, 3.5294e-01,\n",
-       "         3.6399e-01, 4.1190e-01, 5.8751e-01, 6.8494e-01, 7.2698e-01, 8.0101e-01,\n",
-       "         9.2743e-01, 9.7225e-01, 1.1656e+00, 1.4397e+00, 1.4788e+00, 1.6088e+00,\n",
-       "         1.7147e+00, 1.8255e+00, 1.8951e+00, 1.9322e+00, 2.3849e+00, 2.4183e+00,\n",
-       "         2.4902e+00, 2.5441e+00, 2.6483e+00, 2.8371e+00, 2.9705e+00, 3.1383e+00,\n",
-       "         3.2709e+00, 3.3751e+00, 3.3849e+00, 3.4902e+00, 3.5679e+00, 3.5782e+00,\n",
-       "         3.5821e+00, 3.8648e+00, 4.1552e+00, 4.3914e+00, 4.4348e+00, 4.4414e+00,\n",
-       "         4.6038e+00, 4.6099e+00, 4.7481e+00, 4.7528e+00, 4.8005e+00, 4.8134e+00,\n",
-       "         4.8934e+00, 4.9044e+00]),\n",
+       "(tensor([0.0153, 0.1180, 0.1875, 0.4215, 0.5745, 0.6163, 0.6557, 0.6917, 0.7939,\n",
+       "         0.9230, 1.0240, 1.2932, 1.3246, 1.5167, 1.6193, 1.6496, 1.6613, 1.7104,\n",
+       "         1.7485, 1.7840, 1.7889, 2.0187, 2.0398, 2.0413, 2.2665, 2.4287, 2.4440,\n",
+       "         2.6026, 2.6988, 2.7922, 2.8129, 2.9356, 3.0271, 3.0442, 3.0646, 3.1996,\n",
+       "         3.2037, 3.3222, 3.4918, 3.5313, 3.7002, 3.7714, 3.7949, 3.9609, 4.3272,\n",
+       "         4.4440, 4.6667, 4.7213, 4.8963, 4.9971]),\n",
        " tensor([[0.0000, 0.0000, 0.0000,  ..., 0.0000, 0.0000, 0.0000],\n",
        "         [0.1000, 0.1000, 0.1000,  ..., 0.1000, 0.1000, 0.1000],\n",
        "         [0.2000, 0.2000, 0.2000,  ..., 0.2000, 0.2000, 0.2000],\n",
@@ -222,45 +227,78 @@
        "         [4.7000, 4.7000, 4.7000,  ..., 4.7000, 4.7000, 4.7000],\n",
        "         [4.8000, 4.8000, 4.8000,  ..., 4.8000, 4.8000, 4.8000],\n",
        "         [4.9000, 4.9000, 4.9000,  ..., 4.9000, 4.9000, 4.9000]]),\n",
-       " tensor([[6.8662e-02, 6.8567e-02, 6.6769e-02,  ..., 6.3916e-07, 4.3363e-07,\n",
-       "          4.1091e-07],\n",
-       "         [6.4257e-02, 6.4501e-02, 6.3975e-02,  ..., 9.6787e-07, 6.6191e-07,\n",
-       "          6.2792e-07],\n",
-       "         [5.9935e-02, 6.0473e-02, 6.1093e-02,  ..., 1.4608e-06, 1.0070e-06,\n",
-       "          9.5634e-07],\n",
+       " tensor([[7.9004e-02, 7.8465e-02, 7.7637e-02,  ..., 1.1413e-06, 4.9195e-07,\n",
+       "          2.9875e-07],\n",
+       "         [7.2616e-02, 7.2865e-02, 7.2599e-02,  ..., 1.6794e-06, 7.3669e-07,\n",
+       "          4.5190e-07],\n",
+       "         [6.6459e-02, 6.7376e-02, 6.7597e-02,  ..., 2.4606e-06, 1.0985e-06,\n",
+       "          6.8065e-07],\n",
        "         ...,\n",
-       "         [9.4878e-07, 1.2079e-06, 2.7906e-06,  ..., 5.8779e-02, 5.8062e-02,\n",
-       "          5.7935e-02],\n",
-       "         [6.1962e-07, 7.9294e-07, 1.8658e-06,  ..., 6.2113e-02, 6.1848e-02,\n",
-       "          6.1781e-02],\n",
-       "         [4.0301e-07, 5.1842e-07, 1.2425e-06,  ..., 6.5370e-02, 6.5614e-02,\n",
-       "          6.5615e-02]]))"
+       "         [1.3743e-06, 2.2120e-06, 3.0334e-06,  ..., 8.0086e-02, 7.8576e-02,\n",
+       "          7.6646e-02],\n",
+       "         [9.2161e-07, 1.4986e-06, 2.0694e-06,  ..., 8.5977e-02, 8.5846e-02,\n",
+       "          8.4585e-02],\n",
+       "         [6.1460e-07, 1.0097e-06, 1.4040e-06,  ..., 9.1792e-02, 9.3269e-02,\n",
+       "          9.2831e-02]]))"
       ]
      },
-     "execution_count": 10,
+     "execution_count": 9,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
-   "execution_count": 10
+   "execution_count": 9
   },
   {
+   "cell_type": "code",
+   "id": "f76573b2eb74ba7",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:43.435846223Z",
-     "start_time": "2026-05-29T15:19:43.319732830Z"
+     "end_time": "2026-06-30T02:59:03.923768674Z",
+     "start_time": "2026-06-30T02:59:03.813863850Z"
     }
    },
-   "cell_type": "code",
-   "source": "plot_kernel_reg(y_hat)",
-   "id": "f76573b2eb74ba7",
+   "source": [
+    "plot_kernel_reg(y_hat)"
+   ],
    "outputs": [
     {
      "data": {
       "text/plain": [
        "<Figure size 350x250 with 1 Axes>"
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+     },
+     "metadata": {},
+     "output_type": "display_data",
+     "jetTransient": {
+      "display_id": null
+     }
+    }
+   ],
+   "execution_count": 10
+  },
+  {
+   "cell_type": "code",
+   "id": "1bbe3af9e8a0f412",
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2026-06-30T02:59:04.041592329Z",
+     "start_time": "2026-06-30T02:59:03.938730755Z"
+    }
+   },
+   "source": [
+    "d2l.show_heatmaps(attention_weights.unsqueeze(0).unsqueeze(0),\n",
+    "        xlabel='Sorted training inputs',\n",
+    "        ylabel='Sorted testing inputs')"
+   ],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "<Figure size 250x250 with 2 Axes>"
+      ],
+      "image/svg+xml": "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n  \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n<svg xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"206.16425pt\" height=\"159.039469pt\" viewBox=\"0 0 206.16425 159.039469\" xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\">\n <metadata>\n  <rdf:RDF xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:cc=\"http://creativecommons.org/ns#\" xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\">\n   <cc:Work>\n    <dc:type rdf:resource=\"http://purl.org/dc/dcmitype/StillImage\"/>\n    <dc:date>2026-06-30T10:59:04.008946</dc:date>\n    <dc:format>image/svg+xml</dc:format>\n    <dc:creator>\n     <cc:Agent>\n      <dc:title>Matplotlib v3.7.2, https://matplotlib.org/</dc:title>\n     </cc:Agent>\n    </dc:creator>\n   </cc:Work>\n  </rdf:RDF>\n </metadata>\n <defs>\n  <style type=\"text/css\">*{stroke-linejoin: round; stroke-linecap: 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@@ -272,44 +310,14 @@
    "execution_count": 11
   },
   {
+   "cell_type": "code",
+   "id": "aeb79a3bd64c826",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:43.558539946Z",
-     "start_time": "2026-05-29T15:19:43.438360863Z"
+     "end_time": "2026-06-30T02:59:04.105924659Z",
+     "start_time": "2026-06-30T02:59:04.055849961Z"
     }
    },
-   "cell_type": "code",
-   "source": [
-    "d2l.show_heatmaps(attention_weights.unsqueeze(0).unsqueeze(0),\n",
-    "        xlabel='Sorted training inputs',\n",
-    "        ylabel='Sorted testing inputs')"
-   ],
-   "id": "1bbe3af9e8a0f412",
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "<Figure size 250x250 with 2 Axes>"
-      ],
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-     },
-     "metadata": {},
-     "output_type": "display_data",
-     "jetTransient": {
-      "display_id": null
-     }
-    }
-   ],
-   "execution_count": 12
-  },
-  {
-   "metadata": {
-    "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:43.610782245Z",
-     "start_time": "2026-05-29T15:19:43.560607937Z"
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-   },
-   "cell_type": "code",
    "source": [
     "class NWKernelRegression(nn.Module):\n",
     "    def __init__(self,**kwargs):\n",
@@ -321,18 +329,18 @@
     "                -((queries - keys) * self.w)**2 / 2, dim=1)\n",
     "        return torch.bmm(self.attention_weights.unsqueeze(1),values.unsqueeze(-1)).reshape(-1)"
    ],
-   "id": "aeb79a3bd64c826",
    "outputs": [],
-   "execution_count": 13
+   "execution_count": 12
   },
   {
+   "cell_type": "code",
+   "id": "7061ed7f139bc78e",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:43.661276280Z",
-     "start_time": "2026-05-29T15:19:43.611752619Z"
+     "end_time": "2026-06-30T02:59:04.158366434Z",
+     "start_time": "2026-06-30T02:59:04.107607867Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "# X_tile的形状:(n_train，n_train)，每一行都包含着相同的训练输入\n",
     "X_tile = x_train.repeat((n_train, 1))\n",
@@ -343,18 +351,18 @@
     "# values的形状:('n_train'，'n_train'-1)\n",
     "values = Y_tile[(1 - torch.eye(n_train)).type(torch.bool)].reshape((n_train, -1))"
    ],
-   "id": "7061ed7f139bc78e",
    "outputs": [],
-   "execution_count": 14
+   "execution_count": 13
   },
   {
+   "cell_type": "code",
+   "id": "3dca11d4e962d859",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.080669795Z",
-     "start_time": "2026-05-29T15:19:43.662206275Z"
+     "end_time": "2026-06-30T02:59:04.750466831Z",
+     "start_time": "2026-06-30T02:59:04.162845978Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "net = NWKernelRegression()\n",
     "loss = nn.MSELoss(reduction='none')\n",
@@ -368,14 +376,47 @@
     "    print(f'epoch {epoch + 1}, loss {float(l.sum()):.6f}')\n",
     "    animator.add(epoch + 1, float(l.sum()))"
    ],
-   "id": "3dca11d4e962d859",
    "outputs": [
     {
      "data": {
       "text/plain": [
        "<Figure size 350x250 with 1 Axes>"
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+     },
+     "metadata": {},
+     "output_type": "display_data",
+     "jetTransient": {
+      "display_id": null
+     }
+    }
+   ],
+   "execution_count": 14
+  },
+  {
+   "cell_type": "code",
+   "id": "4ff00f0b4983b55e",
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2026-06-30T02:59:04.976760199Z",
+     "start_time": "2026-06-30T02:59:04.799699382Z"
+    }
+   },
+   "source": [
+    "# keys的形状:(n_test，n_train)，每一行包含着相同的训练输入（例如，相同的键）\n",
+    "keys = x_train.repeat((n_test, 1))\n",
+    "# value的形状:(n_test，n_train)\n",
+    "values = y_train.repeat((n_test, 1))\n",
+    "y_hat = net(x_test, keys, values).unsqueeze(1).detach()\n",
+    "plot_kernel_reg(y_hat)"
+   ],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "<Figure size 350x250 with 1 Axes>"
+      ],
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@@ -387,29 +428,26 @@
    "execution_count": 15
   },
   {
+   "cell_type": "code",
+   "id": "97a690478767c3c3",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.196985129Z",
-     "start_time": "2026-05-29T15:19:44.082458369Z"
+     "end_time": "2026-06-30T02:59:05.088839245Z",
+     "start_time": "2026-06-30T02:59:04.978734877Z"
     }
    },
-   "cell_type": "code",
    "source": [
-    "# keys的形状:(n_test，n_train)，每一行包含着相同的训练输入（例如，相同的键）\n",
-    "keys = x_train.repeat((n_test, 1))\n",
-    "# value的形状:(n_test，n_train)\n",
-    "values = y_train.repeat((n_test, 1))\n",
-    "y_hat = net(x_test, keys, values).unsqueeze(1).detach()\n",
-    "plot_kernel_reg(y_hat)"
+    "d2l.show_heatmaps(net.attention_weights.unsqueeze(0).unsqueeze(0),\n",
+    "xlabel='Sorted training inputs',\n",
+    "ylabel='Sorted testing inputs')"
    ],
-   "id": "4ff00f0b4983b55e",
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "<Figure size 350x250 with 1 Axes>"
+       "<Figure size 250x250 with 2 Axes>"
       ],
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      "metadata": {},
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@@ -421,44 +459,14 @@
    "execution_count": 16
   },
   {
+   "cell_type": "code",
+   "id": "8d03d0c7f735b755",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.303651198Z",
-     "start_time": "2026-05-29T15:19:44.199584310Z"
+     "end_time": "2026-06-30T02:59:05.142764987Z",
+     "start_time": "2026-06-30T02:59:05.093810141Z"
     }
    },
-   "cell_type": "code",
-   "source": [
-    "d2l.show_heatmaps(net.attention_weights.unsqueeze(0).unsqueeze(0),\n",
-    "xlabel='Sorted training inputs',\n",
-    "ylabel='Sorted testing inputs')"
-   ],
-   "id": "97a690478767c3c3",
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "<Figure size 250x250 with 2 Axes>"
-      ],
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-     },
-     "metadata": {},
-     "output_type": "display_data",
-     "jetTransient": {
-      "display_id": null
-     }
-    }
-   ],
-   "execution_count": 17
-  },
-  {
-   "metadata": {
-    "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.358514818Z",
-     "start_time": "2026-05-29T15:19:44.306386112Z"
-    }
-   },
-   "cell_type": "code",
    "source": [
     "def masked_softmax(X,valid_lens):\n",
     "    # X:3D valid_len 1D or 2D\n",
@@ -474,46 +482,48 @@
     "        X = d2l.sequence_mask(X.reshape(-1,shape[-1]),valid_lens,value=-1e6)\n",
     "        return nn.functional.softmax(X.reshape(shape),dim=-1)"
    ],
-   "id": "8d03d0c7f735b755",
    "outputs": [],
-   "execution_count": 18
+   "execution_count": 17
   },
   {
+   "cell_type": "code",
+   "id": "27f8c24ec572b267",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.420710191Z",
-     "start_time": "2026-05-29T15:19:44.359351187Z"
+     "end_time": "2026-06-30T02:59:05.208569156Z",
+     "start_time": "2026-06-30T02:59:05.144491160Z"
     }
    },
-   "cell_type": "code",
-   "source": "masked_softmax(torch.rand(2,2,4),torch.tensor([2,3]))",
-   "id": "27f8c24ec572b267",
+   "source": [
+    "masked_softmax(torch.rand(2,2,4),torch.tensor([2,3]))"
+   ],
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "tensor([[[0.6937, 0.3063, 0.0000, 0.0000],\n",
-       "         [0.6165, 0.3835, 0.0000, 0.0000]],\n",
+       "tensor([[[0.5584, 0.4416, 0.0000, 0.0000],\n",
+       "         [0.6205, 0.3795, 0.0000, 0.0000]],\n",
        "\n",
-       "        [[0.3526, 0.3291, 0.3183, 0.0000],\n",
-       "         [0.2735, 0.2359, 0.4906, 0.0000]]])"
+       "        [[0.4421, 0.3398, 0.2181, 0.0000],\n",
+       "         [0.3929, 0.3625, 0.2446, 0.0000]]])"
       ]
      },
-     "execution_count": 19,
+     "execution_count": 18,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
-   "execution_count": 19
+   "execution_count": 18
   },
   {
+   "cell_type": "code",
+   "id": "c7e5254395b14b1",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.470391356Z",
-     "start_time": "2026-05-29T15:19:44.422576814Z"
+     "end_time": "2026-06-30T02:59:05.262719443Z",
+     "start_time": "2026-06-30T02:59:05.210360072Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "class AdditiveAttention(nn.Module):\n",
     "    def __init__(self,key_size,query_size,num_hiddens,dropout,**kwargs):\n",
@@ -535,18 +545,18 @@
     "\n",
     "        return torch.bmm(self.dropout(self.attention_weights), value)"
    ],
-   "id": "c7e5254395b14b1",
    "outputs": [],
-   "execution_count": 20
+   "execution_count": 19
   },
   {
+   "cell_type": "code",
+   "id": "77e325a032e70d98",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.536311739Z",
-     "start_time": "2026-05-29T15:19:44.471725853Z"
+     "end_time": "2026-06-30T02:59:05.332247710Z",
+     "start_time": "2026-06-30T02:59:05.264012533Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "queries,keys = torch.normal(0,1,(2,1,20)) , torch.ones((2,10,2))\n",
     "values =  torch.arange(40,dtype=torch.float32).reshape(1,10,4).repeat(2,1,1)\n",
@@ -556,7 +566,6 @@
     "attention.eval()\n",
     "attention(queries,keys,values,valid_lens)"
    ],
-   "id": "77e325a032e70d98",
    "outputs": [
     {
      "data": {
@@ -566,33 +575,33 @@
        "        [[10.0000, 11.0000, 12.0000, 13.0000]]], grad_fn=<BmmBackward0>)"
       ]
      },
-     "execution_count": 21,
+     "execution_count": 20,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
-   "execution_count": 21
+   "execution_count": 20
   },
   {
+   "cell_type": "code",
+   "id": "93ceedfd6e03982f",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.618227172Z",
-     "start_time": "2026-05-29T15:19:44.538570102Z"
+     "end_time": "2026-06-30T02:59:05.426180301Z",
+     "start_time": "2026-06-30T02:59:05.338806296Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "d2l.show_heatmaps(attention.attention_weights.reshape((1, 1, 2, 10)),\n",
     "        xlabel='Keys', ylabel='Queries')"
    ],
-   "id": "93ceedfd6e03982f",
    "outputs": [
     {
      "data": {
       "text/plain": [
        "<Figure size 250x250 with 2 Axes>"
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@@ -601,16 +610,17 @@
      }
     }
    ],
-   "execution_count": 22
+   "execution_count": 21
   },
   {
+   "cell_type": "code",
+   "id": "8453c76623a5b435",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.668038302Z",
-     "start_time": "2026-05-29T15:19:44.620075434Z"
+     "end_time": "2026-06-30T02:59:05.479115341Z",
+     "start_time": "2026-06-30T02:59:05.429811516Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "import math\n",
     "class DotProductAttention(nn.Module):\n",
@@ -630,25 +640,24 @@
     "\n",
     "        return torch.bmm(self.dropout(self.attention_weights), values)"
    ],
-   "id": "8453c76623a5b435",
    "outputs": [],
-   "execution_count": 23
+   "execution_count": 22
   },
   {
+   "cell_type": "code",
+   "id": "8af6b28944977a62",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.754268677Z",
-     "start_time": "2026-05-29T15:19:44.668929892Z"
+     "end_time": "2026-06-30T02:59:05.547775309Z",
+     "start_time": "2026-06-30T02:59:05.480327680Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "queries = torch.normal(0, 1, (2, 1, 2))\n",
     "attention = DotProductAttention(dropout=0.5)\n",
     "attention.eval()\n",
     "attention(queries, keys, values, valid_lens)"
    ],
-   "id": "8af6b28944977a62",
    "outputs": [
     {
      "data": {
@@ -658,33 +667,33 @@
        "        [[10.0000, 11.0000, 12.0000, 13.0000]]])"
       ]
      },
-     "execution_count": 24,
+     "execution_count": 23,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
-   "execution_count": 24
+   "execution_count": 23
   },
   {
+   "cell_type": "code",
+   "id": "28f7e16771076e33",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.822905172Z",
-     "start_time": "2026-05-29T15:19:44.756082157Z"
+     "end_time": "2026-06-30T02:59:05.663459211Z",
+     "start_time": "2026-06-30T02:59:05.549703930Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "d2l.show_heatmaps(attention.attention_weights.reshape((1, 1, 2, 10)),\n",
     "xlabel='Keys', ylabel='Queries')"
    ],
-   "id": "28f7e16771076e33",
    "outputs": [
     {
      "data": {
       "text/plain": [
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@@ -693,16 +702,17 @@
      }
     }
    ],
-   "execution_count": 25
+   "execution_count": 24
   },
   {
+   "cell_type": "code",
+   "id": "33507bd2e1917a29",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.874393721Z",
-     "start_time": "2026-05-29T15:19:44.824430337Z"
+     "end_time": "2026-06-30T02:59:05.730333551Z",
+     "start_time": "2026-06-30T02:59:05.680995441Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "class AttentionDecoder(d2l.Decoder):\n",
     "    def __init__(self,**kwargs):\n",
@@ -711,18 +721,18 @@
     "    def attention_weight(self):\n",
     "        raise NotImplementedError"
    ],
-   "id": "33507bd2e1917a29",
    "outputs": [],
-   "execution_count": 26
+   "execution_count": 25
   },
   {
+   "cell_type": "code",
+   "id": "a8a497c9041910a1",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.926627628Z",
-     "start_time": "2026-05-29T15:19:44.875567483Z"
+     "end_time": "2026-06-30T02:59:05.781440228Z",
+     "start_time": "2026-06-30T02:59:05.731688196Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "class Seq2SeqAttentionDecoder(AttentionDecoder):\n",
     "    def __init__(self,vocab_size,embed_size,num_hiddens,num_layers,dropout=0,**kwargs):\n",
@@ -772,18 +782,18 @@
     "    def attention_weights(self):\n",
     "        return self._attention_weights"
    ],
-   "id": "a8a497c9041910a1",
    "outputs": [],
-   "execution_count": 27
+   "execution_count": 26
   },
   {
+   "cell_type": "code",
+   "id": "b2a6bc735743bd0f",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:44.996664037Z",
-     "start_time": "2026-05-29T15:19:44.927689328Z"
+     "end_time": "2026-06-30T02:59:05.842620719Z",
+     "start_time": "2026-06-30T02:59:05.782837732Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "encoder = d2l.Seq2SeqEncoder(vocab_size=10, embed_size=8, num_hiddens=16,\n",
     "num_layers=2)\n",
@@ -796,7 +806,6 @@
     "output, state = decoder(X, state)\n",
     "output.shape, len(state), state[0].shape, len(state[1]), state[1][0].shape"
    ],
-   "id": "b2a6bc735743bd0f",
    "outputs": [
     {
      "data": {
@@ -804,34 +813,35 @@
        "(torch.Size([4, 7, 10]), 3, torch.Size([4, 7, 16]), 2, torch.Size([4, 16]))"
       ]
      },
-     "execution_count": 28,
+     "execution_count": 27,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
-   "execution_count": 28
+   "execution_count": 27
   },
   {
-   "metadata": {
-    "ExecuteTime": {
-     "end_time": "2026-05-29T15:19:45.047118759Z",
-     "start_time": "2026-05-29T15:19:44.998053092Z"
-    }
-   },
    "cell_type": "code",
-   "source": "",
    "id": "4c7bf86095f15c98",
-   "outputs": [],
-   "execution_count": 28
-  },
-  {
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:20:14.678359202Z",
-     "start_time": "2026-05-29T15:19:45.048442204Z"
+     "end_time": "2026-06-30T02:59:05.903307506Z",
+     "start_time": "2026-06-30T02:59:05.854726928Z"
     }
    },
+   "source": [],
+   "outputs": [],
+   "execution_count": 27
+  },
+  {
    "cell_type": "code",
+   "id": "5f5cedf74b97bd12",
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2026-06-30T03:22:39.836556973Z",
+     "start_time": "2026-06-30T02:59:05.904535279Z"
+    }
+   },
    "source": [
     "embed_size, num_hiddens, num_layers, dropout = 32, 32, 2, 0.1\n",
     "batch_size, num_steps = 64, 10\n",
@@ -844,13 +854,26 @@
     "net = d2l.EncoderDecoder(encoder, decoder)\n",
     "d2l.train_seq2seq(net, train_iter, lr, num_epochs, tgt_vocab, device)"
    ],
-   "id": "5f5cedf74b97bd12",
    "outputs": [
     {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "loss 0.019, 17862.0 tokens/sec on cuda:0\n"
+     "ename": "KeyboardInterrupt",
+     "evalue": "",
+     "output_type": "error",
+     "traceback": [
+      "\u001B[31m---------------------------------------------------------------------------\u001B[39m",
+      "\u001B[31mKeyboardInterrupt\u001B[39m                         Traceback (most recent call last)",
+      "\u001B[36mCell\u001B[39m\u001B[36m \u001B[39m\u001B[32mIn[28]\u001B[39m\u001B[32m, line 10\u001B[39m\n\u001B[32m      7\u001B[39m decoder = Seq2SeqAttentionDecoder(\n\u001B[32m      8\u001B[39m \u001B[38;5;28mlen\u001B[39m(tgt_vocab), embed_size, num_hiddens, num_layers, dropout)\n\u001B[32m      9\u001B[39m net = d2l.EncoderDecoder(encoder, decoder)\n\u001B[32m---> \u001B[39m\u001B[32m10\u001B[39m \u001B[43md2l\u001B[49m\u001B[43m.\u001B[49m\u001B[43mtrain_seq2seq\u001B[49m\u001B[43m(\u001B[49m\u001B[43mnet\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43mtrain_iter\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43mlr\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43mnum_epochs\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43mtgt_vocab\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43mdevice\u001B[49m\u001B[43m)\u001B[49m\n",
+      "\u001B[36mFile \u001B[39m\u001B[32m~/.conda/envs/nn/lib/python3.11/site-packages/d2l/torch.py:3421\u001B[39m, in \u001B[36mtrain_seq2seq\u001B[39m\u001B[34m(net, data_iter, lr, num_epochs, tgt_vocab, device)\u001B[39m\n\u001B[32m   3418\u001B[39m bos = torch.tensor([tgt_vocab[\u001B[33m'\u001B[39m\u001B[33m<bos>\u001B[39m\u001B[33m'\u001B[39m]] * Y.shape[\u001B[32m0\u001B[39m],\n\u001B[32m   3419\u001B[39m                    device=device).reshape(-\u001B[32m1\u001B[39m, \u001B[32m1\u001B[39m)\n\u001B[32m   3420\u001B[39m dec_input = d2l.concat([bos, Y[:, :-\u001B[32m1\u001B[39m]], \u001B[32m1\u001B[39m)  \u001B[38;5;66;03m# Teacher forcing\u001B[39;00m\n\u001B[32m-> \u001B[39m\u001B[32m3421\u001B[39m Y_hat, _ = \u001B[43mnet\u001B[49m\u001B[43m(\u001B[49m\u001B[43mX\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43mdec_input\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43mX_valid_len\u001B[49m\u001B[43m)\u001B[49m\n\u001B[32m   3422\u001B[39m l = loss(Y_hat, Y, Y_valid_len)\n\u001B[32m   3423\u001B[39m l.sum().backward()  \u001B[38;5;66;03m# Make the loss scalar for `backward`\u001B[39;00m\n",
+      "\u001B[36mFile \u001B[39m\u001B[32m~/.conda/envs/nn/lib/python3.11/site-packages/torch/nn/modules/module.py:1776\u001B[39m, in \u001B[36mModule._wrapped_call_impl\u001B[39m\u001B[34m(self, *args, **kwargs)\u001B[39m\n\u001B[32m   1774\u001B[39m     \u001B[38;5;28;01mreturn\u001B[39;00m \u001B[38;5;28mself\u001B[39m._compiled_call_impl(*args, **kwargs)  \u001B[38;5;66;03m# type: ignore[misc]\u001B[39;00m\n\u001B[32m   1775\u001B[39m \u001B[38;5;28;01melse\u001B[39;00m:\n\u001B[32m-> \u001B[39m\u001B[32m1776\u001B[39m     \u001B[38;5;28;01mreturn\u001B[39;00m \u001B[38;5;28;43mself\u001B[39;49m\u001B[43m.\u001B[49m\u001B[43m_call_impl\u001B[49m\u001B[43m(\u001B[49m\u001B[43m*\u001B[49m\u001B[43margs\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43m*\u001B[49m\u001B[43m*\u001B[49m\u001B[43mkwargs\u001B[49m\u001B[43m)\u001B[49m\n",
+      "\u001B[36mFile \u001B[39m\u001B[32m~/.conda/envs/nn/lib/python3.11/site-packages/torch/nn/modules/module.py:1787\u001B[39m, in \u001B[36mModule._call_impl\u001B[39m\u001B[34m(self, *args, **kwargs)\u001B[39m\n\u001B[32m   1782\u001B[39m \u001B[38;5;66;03m# If we don't have any hooks, we want to skip the rest of the logic in\u001B[39;00m\n\u001B[32m   1783\u001B[39m \u001B[38;5;66;03m# this function, and just call forward.\u001B[39;00m\n\u001B[32m   1784\u001B[39m \u001B[38;5;28;01mif\u001B[39;00m \u001B[38;5;129;01mnot\u001B[39;00m (\u001B[38;5;28mself\u001B[39m._backward_hooks \u001B[38;5;129;01mor\u001B[39;00m \u001B[38;5;28mself\u001B[39m._backward_pre_hooks \u001B[38;5;129;01mor\u001B[39;00m \u001B[38;5;28mself\u001B[39m._forward_hooks \u001B[38;5;129;01mor\u001B[39;00m \u001B[38;5;28mself\u001B[39m._forward_pre_hooks\n\u001B[32m   1785\u001B[39m         \u001B[38;5;129;01mor\u001B[39;00m _global_backward_pre_hooks \u001B[38;5;129;01mor\u001B[39;00m _global_backward_hooks\n\u001B[32m   1786\u001B[39m         \u001B[38;5;129;01mor\u001B[39;00m _global_forward_hooks \u001B[38;5;129;01mor\u001B[39;00m _global_forward_pre_hooks):\n\u001B[32m-> \u001B[39m\u001B[32m1787\u001B[39m     \u001B[38;5;28;01mreturn\u001B[39;00m \u001B[43mforward_call\u001B[49m\u001B[43m(\u001B[49m\u001B[43m*\u001B[49m\u001B[43margs\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43m*\u001B[49m\u001B[43m*\u001B[49m\u001B[43mkwargs\u001B[49m\u001B[43m)\u001B[49m\n\u001B[32m   1789\u001B[39m result = \u001B[38;5;28;01mNone\u001B[39;00m\n\u001B[32m   1790\u001B[39m called_always_called_hooks = \u001B[38;5;28mset\u001B[39m()\n",
+      "\u001B[36mFile \u001B[39m\u001B[32m~/.conda/envs/nn/lib/python3.11/site-packages/d2l/torch.py:964\u001B[39m, in \u001B[36mEncoderDecoder.forward\u001B[39m\u001B[34m(self, enc_X, dec_X, *args)\u001B[39m\n\u001B[32m    962\u001B[39m dec_state = \u001B[38;5;28mself\u001B[39m.decoder.init_state(enc_all_outputs, *args)\n\u001B[32m    963\u001B[39m \u001B[38;5;66;03m# Return decoder output only\u001B[39;00m\n\u001B[32m--> \u001B[39m\u001B[32m964\u001B[39m \u001B[38;5;28;01mreturn\u001B[39;00m \u001B[38;5;28;43mself\u001B[39;49m\u001B[43m.\u001B[49m\u001B[43mdecoder\u001B[49m\u001B[43m(\u001B[49m\u001B[43mdec_X\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43mdec_state\u001B[49m\u001B[43m)\u001B[49m\n",
+      "\u001B[36mFile \u001B[39m\u001B[32m~/.conda/envs/nn/lib/python3.11/site-packages/torch/nn/modules/module.py:1776\u001B[39m, in \u001B[36mModule._wrapped_call_impl\u001B[39m\u001B[34m(self, *args, **kwargs)\u001B[39m\n\u001B[32m   1774\u001B[39m     \u001B[38;5;28;01mreturn\u001B[39;00m \u001B[38;5;28mself\u001B[39m._compiled_call_impl(*args, **kwargs)  \u001B[38;5;66;03m# type: ignore[misc]\u001B[39;00m\n\u001B[32m   1775\u001B[39m \u001B[38;5;28;01melse\u001B[39;00m:\n\u001B[32m-> \u001B[39m\u001B[32m1776\u001B[39m     \u001B[38;5;28;01mreturn\u001B[39;00m \u001B[38;5;28;43mself\u001B[39;49m\u001B[43m.\u001B[49m\u001B[43m_call_impl\u001B[49m\u001B[43m(\u001B[49m\u001B[43m*\u001B[49m\u001B[43margs\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43m*\u001B[49m\u001B[43m*\u001B[49m\u001B[43mkwargs\u001B[49m\u001B[43m)\u001B[49m\n",
+      "\u001B[36mFile \u001B[39m\u001B[32m~/.conda/envs/nn/lib/python3.11/site-packages/torch/nn/modules/module.py:1787\u001B[39m, in \u001B[36mModule._call_impl\u001B[39m\u001B[34m(self, *args, **kwargs)\u001B[39m\n\u001B[32m   1782\u001B[39m \u001B[38;5;66;03m# If we don't have any hooks, we want to skip the rest of the logic in\u001B[39;00m\n\u001B[32m   1783\u001B[39m \u001B[38;5;66;03m# this function, and just call forward.\u001B[39;00m\n\u001B[32m   1784\u001B[39m \u001B[38;5;28;01mif\u001B[39;00m \u001B[38;5;129;01mnot\u001B[39;00m (\u001B[38;5;28mself\u001B[39m._backward_hooks \u001B[38;5;129;01mor\u001B[39;00m \u001B[38;5;28mself\u001B[39m._backward_pre_hooks \u001B[38;5;129;01mor\u001B[39;00m \u001B[38;5;28mself\u001B[39m._forward_hooks \u001B[38;5;129;01mor\u001B[39;00m \u001B[38;5;28mself\u001B[39m._forward_pre_hooks\n\u001B[32m   1785\u001B[39m         \u001B[38;5;129;01mor\u001B[39;00m _global_backward_pre_hooks \u001B[38;5;129;01mor\u001B[39;00m _global_backward_hooks\n\u001B[32m   1786\u001B[39m         \u001B[38;5;129;01mor\u001B[39;00m _global_forward_hooks \u001B[38;5;129;01mor\u001B[39;00m _global_forward_pre_hooks):\n\u001B[32m-> \u001B[39m\u001B[32m1787\u001B[39m     \u001B[38;5;28;01mreturn\u001B[39;00m \u001B[43mforward_call\u001B[49m\u001B[43m(\u001B[49m\u001B[43m*\u001B[49m\u001B[43margs\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43m*\u001B[49m\u001B[43m*\u001B[49m\u001B[43mkwargs\u001B[49m\u001B[43m)\u001B[49m\n\u001B[32m   1789\u001B[39m result = \u001B[38;5;28;01mNone\u001B[39;00m\n\u001B[32m   1790\u001B[39m called_always_called_hooks = \u001B[38;5;28mset\u001B[39m()\n",
+      "\u001B[36mCell\u001B[39m\u001B[36m \u001B[39m\u001B[32mIn[26]\u001B[39m\u001B[32m, line 37\u001B[39m, in \u001B[36mSeq2SeqAttentionDecoder.forward\u001B[39m\u001B[34m(self, X, state)\u001B[39m\n\u001B[32m     35\u001B[39m x = torch.cat((context, torch.unsqueeze(x, dim=\u001B[32m1\u001B[39m)), dim=-\u001B[32m1\u001B[39m)\n\u001B[32m     36\u001B[39m \u001B[38;5;66;03m# 将x变形为(1,batch_size,embed_size+num_hiddens)\u001B[39;00m\n\u001B[32m---> \u001B[39m\u001B[32m37\u001B[39m out, hidden_state = \u001B[38;5;28;43mself\u001B[39;49m\u001B[43m.\u001B[49m\u001B[43mrnn\u001B[49m\u001B[43m(\u001B[49m\u001B[43mx\u001B[49m\u001B[43m.\u001B[49m\u001B[43mpermute\u001B[49m\u001B[43m(\u001B[49m\u001B[32;43m1\u001B[39;49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[32;43m0\u001B[39;49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[32;43m2\u001B[39;49m\u001B[43m)\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43mhidden_state\u001B[49m\u001B[43m)\u001B[49m\n\u001B[32m     38\u001B[39m outputs.append(out)\n\u001B[32m     39\u001B[39m \u001B[38;5;28mself\u001B[39m._attention_weights.append(\u001B[38;5;28mself\u001B[39m.attention.attention_weights)\n",
+      "\u001B[36mFile \u001B[39m\u001B[32m~/.conda/envs/nn/lib/python3.11/site-packages/torch/nn/modules/module.py:1776\u001B[39m, in \u001B[36mModule._wrapped_call_impl\u001B[39m\u001B[34m(self, *args, **kwargs)\u001B[39m\n\u001B[32m   1774\u001B[39m     \u001B[38;5;28;01mreturn\u001B[39;00m \u001B[38;5;28mself\u001B[39m._compiled_call_impl(*args, **kwargs)  \u001B[38;5;66;03m# type: ignore[misc]\u001B[39;00m\n\u001B[32m   1775\u001B[39m \u001B[38;5;28;01melse\u001B[39;00m:\n\u001B[32m-> \u001B[39m\u001B[32m1776\u001B[39m     \u001B[38;5;28;01mreturn\u001B[39;00m \u001B[38;5;28;43mself\u001B[39;49m\u001B[43m.\u001B[49m\u001B[43m_call_impl\u001B[49m\u001B[43m(\u001B[49m\u001B[43m*\u001B[49m\u001B[43margs\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43m*\u001B[49m\u001B[43m*\u001B[49m\u001B[43mkwargs\u001B[49m\u001B[43m)\u001B[49m\n",
+      "\u001B[36mFile \u001B[39m\u001B[32m~/.conda/envs/nn/lib/python3.11/site-packages/torch/nn/modules/module.py:1787\u001B[39m, in \u001B[36mModule._call_impl\u001B[39m\u001B[34m(self, *args, **kwargs)\u001B[39m\n\u001B[32m   1782\u001B[39m \u001B[38;5;66;03m# If we don't have any hooks, we want to skip the rest of the logic in\u001B[39;00m\n\u001B[32m   1783\u001B[39m \u001B[38;5;66;03m# this function, and just call forward.\u001B[39;00m\n\u001B[32m   1784\u001B[39m \u001B[38;5;28;01mif\u001B[39;00m \u001B[38;5;129;01mnot\u001B[39;00m (\u001B[38;5;28mself\u001B[39m._backward_hooks \u001B[38;5;129;01mor\u001B[39;00m \u001B[38;5;28mself\u001B[39m._backward_pre_hooks \u001B[38;5;129;01mor\u001B[39;00m \u001B[38;5;28mself\u001B[39m._forward_hooks \u001B[38;5;129;01mor\u001B[39;00m \u001B[38;5;28mself\u001B[39m._forward_pre_hooks\n\u001B[32m   1785\u001B[39m         \u001B[38;5;129;01mor\u001B[39;00m _global_backward_pre_hooks \u001B[38;5;129;01mor\u001B[39;00m _global_backward_hooks\n\u001B[32m   1786\u001B[39m         \u001B[38;5;129;01mor\u001B[39;00m _global_forward_hooks \u001B[38;5;129;01mor\u001B[39;00m _global_forward_pre_hooks):\n\u001B[32m-> \u001B[39m\u001B[32m1787\u001B[39m     \u001B[38;5;28;01mreturn\u001B[39;00m \u001B[43mforward_call\u001B[49m\u001B[43m(\u001B[49m\u001B[43m*\u001B[49m\u001B[43margs\u001B[49m\u001B[43m,\u001B[49m\u001B[43m \u001B[49m\u001B[43m*\u001B[49m\u001B[43m*\u001B[49m\u001B[43mkwargs\u001B[49m\u001B[43m)\u001B[49m\n\u001B[32m   1789\u001B[39m result = \u001B[38;5;28;01mNone\u001B[39;00m\n\u001B[32m   1790\u001B[39m called_always_called_hooks = \u001B[38;5;28mset\u001B[39m()\n",
+      "\u001B[36mFile \u001B[39m\u001B[32m~/.conda/envs/nn/lib/python3.11/site-packages/torch/nn/modules/rnn.py:1415\u001B[39m, in \u001B[36mGRU.forward\u001B[39m\u001B[34m(self, input, hx)\u001B[39m\n\u001B[32m   1413\u001B[39m \u001B[38;5;28mself\u001B[39m.check_forward_args(\u001B[38;5;28minput\u001B[39m, hx, batch_sizes)\n\u001B[32m   1414\u001B[39m \u001B[38;5;28;01mif\u001B[39;00m batch_sizes \u001B[38;5;129;01mis\u001B[39;00m \u001B[38;5;28;01mNone\u001B[39;00m:\n\u001B[32m-> \u001B[39m\u001B[32m1415\u001B[39m     result = \u001B[43m_VF\u001B[49m\u001B[43m.\u001B[49m\u001B[43mgru\u001B[49m\u001B[43m(\u001B[49m\n\u001B[32m   1416\u001B[39m \u001B[43m        \u001B[49m\u001B[38;5;28;43minput\u001B[39;49m\u001B[43m,\u001B[49m\n\u001B[32m   1417\u001B[39m \u001B[43m        \u001B[49m\u001B[43mhx\u001B[49m\u001B[43m,\u001B[49m\n\u001B[32m   1418\u001B[39m \u001B[43m        \u001B[49m\u001B[38;5;28;43mself\u001B[39;49m\u001B[43m.\u001B[49m\u001B[43m_flat_weights\u001B[49m\u001B[43m,\u001B[49m\u001B[43m  \u001B[49m\u001B[38;5;66;43;03m# type: ignore[arg-type]\u001B[39;49;00m\n\u001B[32m   1419\u001B[39m \u001B[43m        \u001B[49m\u001B[38;5;28;43mself\u001B[39;49m\u001B[43m.\u001B[49m\u001B[43mbias\u001B[49m\u001B[43m,\u001B[49m\n\u001B[32m   1420\u001B[39m \u001B[43m        \u001B[49m\u001B[38;5;28;43mself\u001B[39;49m\u001B[43m.\u001B[49m\u001B[43mnum_layers\u001B[49m\u001B[43m,\u001B[49m\n\u001B[32m   1421\u001B[39m \u001B[43m        \u001B[49m\u001B[38;5;28;43mself\u001B[39;49m\u001B[43m.\u001B[49m\u001B[43mdropout\u001B[49m\u001B[43m,\u001B[49m\n\u001B[32m   1422\u001B[39m \u001B[43m        \u001B[49m\u001B[38;5;28;43mself\u001B[39;49m\u001B[43m.\u001B[49m\u001B[43mtraining\u001B[49m\u001B[43m,\u001B[49m\n\u001B[32m   1423\u001B[39m \u001B[43m        \u001B[49m\u001B[38;5;28;43mself\u001B[39;49m\u001B[43m.\u001B[49m\u001B[43mbidirectional\u001B[49m\u001B[43m,\u001B[49m\n\u001B[32m   1424\u001B[39m \u001B[43m        \u001B[49m\u001B[38;5;28;43mself\u001B[39;49m\u001B[43m.\u001B[49m\u001B[43mbatch_first\u001B[49m\u001B[43m,\u001B[49m\n\u001B[32m   1425\u001B[39m \u001B[43m    \u001B[49m\u001B[43m)\u001B[49m\n\u001B[32m   1426\u001B[39m \u001B[38;5;28;01melse\u001B[39;00m:\n\u001B[32m   1427\u001B[39m     result = _VF.gru(\n\u001B[32m   1428\u001B[39m         \u001B[38;5;28minput\u001B[39m,\n\u001B[32m   1429\u001B[39m         batch_sizes,\n\u001B[32m   (...)\u001B[39m\u001B[32m   1436\u001B[39m         \u001B[38;5;28mself\u001B[39m.bidirectional,\n\u001B[32m   1437\u001B[39m     )\n",
+      "\u001B[31mKeyboardInterrupt\u001B[39m: "
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      },
      "metadata": {},
      "output_type": "display_data",
@@ -867,16 +890,17 @@
      }
     }
    ],
-   "execution_count": 29
+   "execution_count": 28
   },
   {
+   "cell_type": "code",
+   "id": "ddaed8bd284ee01b",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:20:14.794039857Z",
-     "start_time": "2026-05-29T15:20:14.727727180Z"
+     "end_time": "2026-06-30T03:22:50.427691735Z",
+     "start_time": "2026-06-30T03:22:50.314718050Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "engs = ['go .', \"i lost .\", 'he\\'s calm .', 'i\\'m home .']\n",
     "fras = ['va !', 'j\\'ai perdu .', 'il est calme .', 'je suis chez moi .']\n",
@@ -886,7 +910,6 @@
     "    print(f'{eng} => {translation}, ',\n",
     "                f'bleu {d2l.bleu(translation, fra, k=2):.3f}')"
    ],
-   "id": "ddaed8bd284ee01b",
    "outputs": [
     {
      "name": "stdout",
@@ -894,21 +917,22 @@
      "text": [
       "go . => va !,  bleu 1.000\n",
       "i lost . => j'ai perdu .,  bleu 1.000\n",
-      "he's calm . => il est <unk> .,  bleu 0.658\n",
-      "i'm home . => je suis chez moi .,  bleu 1.000\n"
+      "he's calm . => il est riche .,  bleu 0.658\n",
+      "i'm home . => je suis calme .,  bleu 0.512\n"
      ]
     }
    ],
-   "execution_count": 30
+   "execution_count": 29
   },
   {
+   "cell_type": "code",
+   "id": "13d19f8b5048c74d",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:20:38.342057516Z",
-     "start_time": "2026-05-29T15:20:38.288567783Z"
+     "end_time": "2026-06-30T03:22:57.445168273Z",
+     "start_time": "2026-06-30T03:22:57.376381899Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "class MultiHeadAttention(nn.Module):\n",
     "    def __init__(self, key_size, query_size, value_size, num_hiddens,\n",
@@ -955,25 +979,24 @@
     "    X = X.permute(0, 2, 1, 3)\n",
     "    return X.reshape(X.shape[0], X.shape[1], -1)\n"
    ],
-   "id": "13d19f8b5048c74d",
    "outputs": [],
-   "execution_count": 32
+   "execution_count": 30
   },
   {
+   "cell_type": "code",
+   "id": "b25c661a511d7763",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:20:39.251763154Z",
-     "start_time": "2026-05-29T15:20:39.201715213Z"
+     "end_time": "2026-06-30T03:22:58.271805155Z",
+     "start_time": "2026-06-30T03:22:58.200822898Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "num_hiddens, num_heads = 100, 5\n",
     "attention = MultiHeadAttention(num_hiddens, num_hiddens, num_hiddens,\n",
     "num_hiddens, num_heads, 0.5)\n",
     "attention.eval()"
    ],
-   "id": "b25c661a511d7763",
    "outputs": [
     {
      "data": {
@@ -989,21 +1012,22 @@
        ")"
       ]
      },
-     "execution_count": 33,
+     "execution_count": 31,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
-   "execution_count": 33
+   "execution_count": 31
   },
   {
+   "cell_type": "code",
+   "id": "49877c929741ec94",
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2026-05-29T15:20:40.455647106Z",
-     "start_time": "2026-05-29T15:20:40.307682855Z"
+     "end_time": "2026-06-30T03:22:58.957157613Z",
+     "start_time": "2026-06-30T03:22:58.850698625Z"
     }
    },
-   "cell_type": "code",
    "source": [
     "batch_size, num_queries = 2, 4\n",
     "num_kvpairs, valid_lens = 6, torch.tensor([3, 2])\n",
@@ -1011,7 +1035,6 @@
     "Y = torch.ones((batch_size, num_kvpairs, num_hiddens))\n",
     "attention(X, Y, Y, valid_lens).shape"
    ],
-   "id": "49877c929741ec94",
    "outputs": [
     {
      "data": {
@@ -1019,25 +1042,143 @@
        "torch.Size([2, 4, 100])"
       ]
      },
-     "execution_count": 34,
+     "execution_count": 32,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
-   "execution_count": 34
+   "execution_count": 32
+  },
+  {
+   "cell_type": "code",
+   "id": "b8a10576c7789750",
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2026-06-30T03:24:09.856237679Z",
+     "start_time": "2026-06-30T03:24:09.793761501Z"
+    }
+   },
+   "source": [
+    "class PositionalEncoding(nn.Module):\n",
+    "    def __init__(self,num_hiddens,dropout,max_len=1000):\n",
+    "        super().__init__()\n",
+    "        self.dropout = nn.Dropout(dropout)\n",
+    "        self.dropout = nn.Dropout(dropout)\n",
+    "        X = torch.arange(max_len, dtype=torch.float32).reshape(\n",
+    "                                -1, 1) / torch.pow(10000, torch.arange(\n",
+    "                                            0, num_hiddens, 2, dtype=torch.float32) / num_hiddens)\n",
+    "        self.P = torch.zeros((1,max_len,num_hiddens))\n",
+    "        self.P[:,:,0::2] = torch.sin(X)\n",
+    "        self.P[:,:,1::2] = torch.cos(X)\n",
+    "    def forward(self,X):\n",
+    "        X = X + self.P[:,:X.shape[1],:].to(X.device)\n",
+    "        return self.dropout(X)"
+   ],
+   "outputs": [],
+   "execution_count": 35
+  },
+  {
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2026-06-30T03:24:10.924435124Z",
+     "start_time": "2026-06-30T03:24:10.759631840Z"
+    }
+   },
+   "cell_type": "code",
+   "source": [
+    "encoding_dim, num_steps = 32, 60\n",
+    "pos_encoding = PositionalEncoding(encoding_dim, 0)\n",
+    "pos_encoding.eval()\n",
+    "X = pos_encoding(torch.zeros((1, num_steps, encoding_dim)))\n",
+    "P = pos_encoding.P[:, :X.shape[1], :]\n",
+    "d2l.plot(torch.arange(num_steps), P[0, :, 6:10].T, xlabel='Row (position)',\n",
+    "        figsize=(6, 2.5), legend=[\"Col %d\" % d for d in torch.arange(6, 10)])"
+   ],
+   "id": "fe6cd8d94205977f",
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "<Figure size 600x250 with 1 Axes>"
+      ],
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+     },
+     "metadata": {},
+     "output_type": "display_data",
+     "jetTransient": {
+      "display_id": null
+     }
+    }
+   ],
+   "execution_count": 36
+  },
+  {
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2026-06-30T03:29:41.868213373Z",
+     "start_time": "2026-06-30T03:29:41.818146905Z"
+    }
+   },
+   "cell_type": "code",
+   "source": [
+    "class PositionWiseFFN(nn.Module):\n",
+    "    def __init__(self,ffn_num_input,ffn_num_hiddens,ffn_num_outputs,**kwargs):\n",
+    "        super().__init__(**kwargs)\n",
+    "        self.dense1 = nn.Linear(ffn_num_input,ffn_num_hiddens)\n",
+    "        self.relu = nn.ReLU()\n",
+    "        self.dense2 = nn.Linear(ffn_num_hiddens,ffn_num_outputs)\n",
+    "    def forward(self,X):\n",
+    "        return self.dense2(self.relu(self.dense1(X)))\n"
+   ],
+   "id": "b764f19d408049b",
+   "outputs": [],
+   "execution_count": 38
+  },
+  {
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2026-06-30T03:35:03.713494687Z",
+     "start_time": "2026-06-30T03:35:03.630606833Z"
+    }
+   },
+   "cell_type": "code",
+   "source": [
+    "class AddNorm(nn.Module):\n",
+    "    def __init__(self,normalized_shape,dropout,**kwargs):\n",
+    "        super().__init__()\n",
+    "        self.dropout=nn.Dropout()\n",
+    "        self.ln = nn.LayerNorm(normalized_shape)\n",
+    "    def forward(self,X,Y):\n",
+    "        return self.ln(self.dropout(Y)+X)\n"
+   ],
+   "id": "377f4d9eea428068",
+   "outputs": [],
+   "execution_count": 39
   },
   {
    "metadata": {},
    "cell_type": "code",
    "outputs": [],
    "execution_count": null,
-   "source": "",
-   "id": "b8a10576c7789750"
+   "source": [
+    "class EncoderBlock(nn.Moudle):\n",
+    "    def __init(self,key_size,query_size,value_size,num_hiddens,norm_shape,ffn_num_input,ffn_num_hiddens,num_heads,dropout,use_bias=False,**kwargs):\n",
+    "        super(EncoderBlock,self).__init__(**kwargs)\n",
+    "        self.attention = MultiHeadAttention(key_size,query_size,value_size,num_hiddens,num_heads,dropout,bias=use_bias)\n",
+    "        self.addnorm1 = AddNorm(norm_shape,dropout)\n",
+    "        self.ffn = PositionWiseFFN(\n",
+    "            ffn_num_input, ffn_num_hiddens, num_hiddens)\n",
+    "        self.addnorm2 = AddNorm(norm_shape, dropout)\n",
+    "    def forward(self, X, valid_lens):\n",
+    "        Y = self.addnorm1(X, self.attention(X, X, X, valid_lens))\n",
+    "        return self.addnorm2(Y, self.ffn(Y))"
+   ],
+   "id": "c54dc4e20e9ffb90"
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },