cudf_row_udf_complex.ipynb

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     "text": [
      "0       4\n",
      "1      11\n",
      "2    <NA>\n",
      "3      42\n",
      "dtype: int64\n"
     ]
    }
   ],
   "source": [
    "import cudf\n",
    "\n",
    "df = cudf.DataFrame({\n",
    "    'a': [1,cudf.NA,3, cudf.NA],\n",
    "    'b': [4,5,cudf.NA, cudf.NA]\n",
    "})\n",
    "\n",
    "def f(row):\n",
    "    x = row['a']\n",
    "    y = row['b']\n",
    "\n",
    "    if x is cudf.NA and y is cudf.NA:\n",
    "        return 42\n",
    "\n",
    "    elif x is cudf.NA:\n",
    "        return 11\n",
    "    \n",
    "    elif y is cudf.NA:\n",
    "        return cudf.NA\n",
    "    \n",
    "    else:\n",
    "        return x + y - 1\n",
    "    \n",
    "result = df.apply(f, axis=1)\n",
    "print(result)"
   ]
  }
 ],
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