fixed lab02 and lab04

Author: rbtzuniga

lab_02/lab_02_example.ipynb

@@ -2,14 +2,13 @@
   "cells": [
     {
       "cell_type": "code",
-      "execution_count": 3,
+      "execution_count": null,
       "metadata": {
         "id": "zTjNVsgG7X76"
       },
       "outputs": [],
       "source": [
         "import pandas as pd\n",
-        "from matplotlib import pyplot as plt\n",
         "import plotly"
       ]
     },

lab_04/flask_lab_example.py

@@ -1,4 +1,5 @@
-from flask import Flask, jsonify, request
+from flask import Flask
+from flask import request
 import pandas as pd 
 
 app = Flask(__name__)