added download process

C3W2_GauGAN_(Optional).ipynb

@@ -744,9 +744,31 @@
         "\n",
         "Specifically, you should download the `gtFine_trainvaltest` and `leftImg8bit_trainvaltest` and specify the corresponding data splits into the dataloader.\n",
         "\n",
-        "Below is a quick dataset class to help you load and preprocess the Cityscapes examples."
+        "Below is a quick dataset class to help you load and preprocess the Cityscapes examples. You can also run the code below to download the dataset, after you've created an account at http://cityscapes-dataset.com."
       ]
     },
+    {
+      "cell_type": "code",
+      "metadata": {
+        "id": "AAjgcHDS64_o"
+      },
+      "source": [
+        "# Store necessary cookies\n",
+        "import getpass, os\n",
+        "username = input(\"What is your Cityscapes username? (http://cityscapes-dataset.com) \")\n",
+        "password = getpass.getpass(\"What is your Cityscapes password? \")\n",
+        "os.mkdir(\"data\")\n",
+        "os.system(f\"wget --keep-session-cookies --save-cookies=data/cookies.txt --post-data 'username={username}&password={password}&submit=Login' https://www.cityscapes-dataset.com/login/\")\n",
+        "# Download data\n",
+        "!cd data; wget --load-cookies cookies.txt --content-disposition https://www.cityscapes-dataset.com/file-handling/?packageID=1\n",
+        "!cd data; wget --load-cookies cookies.txt --content-disposition https://www.cityscapes-dataset.com/file-handling/?packageID=3\n",
+        "# Unzip data\n",
+        "!cd data; unzip leftImg8bit_trainvaltest\n",
+        "!cd data; unzip gtFine_trainvaltest"
+      ],
+      "execution_count": null,
+      "outputs": []
+    },
     {
       "cell_type": "code",
       "metadata": {
@@ -938,11 +960,11 @@
       "cell_type": "code",
       "metadata": {
         "id": "w-2lU4TnK5ik",
-        "outputId": "a51b2643-9efe-4141-f9c3-7cba91398cc4",
         "colab": {
           "base_uri": "https://localhost:8080/",
           "height": 1000
-        }
+        },
+        "outputId": "a51b2643-9efe-4141-f9c3-7cba91398cc4"
       },
       "source": [
         "from torchvision.utils import make_grid\n",