Set index by keeping old index.ipynb

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     "text": [
      "Before set index: \n",
      "      Name  Age  Marks\n",
      "s1    Joe   20  85.10\n",
      "s2    Nat   21  77.80\n",
      "s3  Harry   19  91.54\n",
      "\n",
      "After set index: \n",
      "           Age  Marks\n",
      "   Name             \n",
      "s1 Joe     20  85.10\n",
      "s2 Nat     21  77.80\n",
      "s3 Harry   19  91.54\n"
     ]
    }
   ],
   "source": [
    "import pandas as pd\n",
    "\n",
    "student_dict = {'Name':['Joe','Nat','Harry'], 'Age':[20,21,19], 'Marks':[85.10, 77.80, 91.54]}\n",
    "\n",
    "# create DataFrame from dict\n",
    "student_df = pd.DataFrame(student_dict, index = ['s1','s2','s3'])\n",
    "print(\"Before set index: \\n\", student_df)\n",
    "\n",
    "# set index by append\n",
    "student_df = student_df.set_index('Name', append=True)\n",
    "print(\"\\nAfter set index: \\n\", student_df)"
   ]
  },
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