CS320F23L23E1.ipynb

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    "# Code attribution: Yiyin Shen, Tyler Caraza-Harter\n",
    "# Imports\n",
    "from flask import Flask, request, Response\n",
    "from io import BytesIO\n",
    "import matplotlib.pyplot as plt\n",
    "import pandas\n",
    "import json"
   ]
  },
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     "text": [
      " * Serving Flask app 'app'\n",
      " * Debug mode: off\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.\n",
      " * Running on all addresses (0.0.0.0)\n",
      " * Running on http://127.0.0.1:5000\n",
      " * Running on http://10.141.244.68:5000\n",
      "Press CTRL+C to quit\n",
      "10.141.244.68 - - [25/Oct/2023 11:18:18] \"GET / HTTP/1.1\" 200 -\n",
      "10.141.244.68 - - [25/Oct/2023 11:18:18] \"GET /grades.svg?col=Project HTTP/1.1\" 200 -\n",
      "10.141.244.68 - - [25/Oct/2023 11:18:18] \"GET /grades.png?col=Quiz HTTP/1.1\" 200 -\n",
      "10.141.244.68 - - [25/Oct/2023 11:20:40] \"GET /grades.png?col=Exam HTTP/1.1\" 200 -\n",
      "10.141.244.68 - - [25/Oct/2023 11:21:29] \"GET /grades.svg?col=Exam HTTP/1.1\" 200 -\n",
      "10.141.244.68 - - [25/Oct/2023 11:26:41] \"GET /grades.json?col=Exam HTTP/1.1\" 404 -\n",
      "[2023-10-25 11:26:51,357] ERROR in app: Exception on /grades.json/x [GET]\n",
      "Traceback (most recent call last):\n",
      "  File \"C:\\Users\\young\\AppData\\Local\\Programs\\Python\\Python311\\Lib\\site-packages\\flask\\app.py\", line 1455, in wsgi_app\n",
      "    response = self.full_dispatch_request()\n",
      "               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
      "  File \"C:\\Users\\young\\AppData\\Local\\Programs\\Python\\Python311\\Lib\\site-packages\\flask\\app.py\", line 869, in full_dispatch_request\n",
      "    rv = self.handle_user_exception(e)\n",
      "         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
      "  File \"C:\\Users\\young\\AppData\\Local\\Programs\\Python\\Python311\\Lib\\site-packages\\flask\\app.py\", line 867, in full_dispatch_request\n",
      "    rv = self.dispatch_request()\n",
      "         ^^^^^^^^^^^^^^^^^^^^^^^\n",
      "  File \"C:\\Users\\young\\AppData\\Local\\Programs\\Python\\Python311\\Lib\\site-packages\\flask\\app.py\", line 852, in dispatch_request\n",
      "    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)\n",
      "           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n",
      "TypeError: grades_json() got an unexpected keyword argument 'x'\n",
      "10.141.244.68 - - [25/Oct/2023 11:26:51] \"GET /grades.json/x?col=Exam HTTP/1.1\" 500 -\n"
     ]
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   ],
   "source": [
    "# Build a webpage that displays the grades as histogram as json\n",
    "app = Flask(\"app\")\n",
    "\n",
    "@app.route(\"/\")\n",
    "def home():\n",
    "    return \"\"\"\n",
    "    <html>\n",
    "    <body>\n",
    "    <h1>Quiz PNG</h1>\n",
    "    <img src=\"grades.png?col=Quiz\" width=\"250\"><br>\n",
    "    <h1>Project SVG</h1>\n",
    "    <img src=\"grades.svg?col=Project\" width=\"250\"><br>\n",
    "    </body>\n",
    "    </html>\n",
    "    \"\"\"\n",
    "\n",
    "@app.route(\"/grades.png\")\n",
    "def grades_png():\n",
    "    if request.args and request.args[\"col\"]:\n",
    "        table = pandas.read_csv(\"Grades.csv\")\n",
    "        fig, ax = plt.subplots()\n",
    "        col = request.args[\"col\"]\n",
    "        if col in [\"Quiz\", \"Project\", \"Exam\"]:\n",
    "            ax.hist(table[col])\n",
    "            ax.set_title(col + \" Grades\")\n",
    "            fake_file = BytesIO()\n",
    "            fig.savefig(fake_file, format = \"png\")\n",
    "            return Response(fake_file.getvalue(), headers = {\"Content-Type\": \"image/png\"})\n",
    "        else:\n",
    "            return \"Column not found.\"\n",
    "    else:\n",
    "        return \"Column not specified.\"\n",
    "\n",
    "@app.route(\"/grades.svg\")\n",
    "def grades_svg():\n",
    "    if request.args and request.args[\"col\"]:\n",
    "        table = pandas.read_csv(\"Grades.csv\")\n",
    "        fig, ax = plt.subplots()\n",
    "        col = request.args[\"col\"]\n",
    "        if col in [\"Quiz\", \"Project\", \"Exam\"]:\n",
    "            ax.hist(table[col])\n",
    "            ax.set_title(col + \" Grades\")\n",
    "            fake_file = BytesIO()\n",
    "            fig.savefig(fake_file, format = \"svg\")\n",
    "            return Response(fake_file.getvalue(), headers = {\"Content-Type\": \"image/svg+xml\"})\n",
    "        else:\n",
    "            return \"Column not found.\"\n",
    "    else:\n",
    "        return \"Column not specified.\"\n",
    "\n",
    "@app.route(\"/grades.json\")\n",
    "def grades_json():\n",
    "    if request.args and request.args[\"col\"]:\n",
    "        table = pandas.read_csv(\"Grades.csv\")\n",
    "        col = request.args[\"col\"]\n",
    "        if col in [\"Quiz\", \"Project\", \"Exam\"]:\n",
    "            table = pandas.read_csv(\"Grades.csv\")\n",
    "            table = table.sample(frac = 1).reset_index(drop = True)\n",
    "            return Response(table[col].to_json(), headers = {\"Content-Type\": \"application/json\"})\n",
    "        else:\n",
    "            return json.dumps({\"1\":\"0\", \"2\":\"0\", \"3\":\"0\"})\n",
    "    else:\n",
    "        return \"Column not specified.\"\n",
    "\n",
    "app.run(host = \"0.0.0.0\", debug = False, threaded = False)"
   ]
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