Day30_LEETCODE_1112. Highest Grade For Each Student.ipynb

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    "import pandas as pd\n",
    "\n",
    "def highest_grade(enrollments: pd.DataFrame) -> pd.DataFrame:\n",
    "    # Soring by student_id asc, grade desc , course_id asc  , in that order\n",
    "    # Performing group by on student_id & choosing 1st row of the group only\n",
    "    \n",
    "    result= enrollments.sort_values( by= [\"student_id\",\"grade\",\"course_id\"], ascending=[True,False,True]).groupby(\"student_id\").head(1).reset_index(drop=True)\n",
    "    \n",
    "    return result"
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