Типо сделал, но вывод нулевых значений это зашквар.

LabWork01/FuncLoad.py

@@ -1,16 +1,9 @@
 import csv
+import numpy as np
+import pandas as pd
 from LabWork01.Shop import Shop
 
-def createList():
-    newListShop = []
+def createDataFrame():
+    df = pd.read_csv('../res/Stores.csv')
 
-    file = open("../res/Stores.csv", "r")
-    data = list(csv.reader(file, delimiter=","))
-    file.close()
-
-    for elem in data:
-        newListShop.append(Shop(elem[1], elem[2], elem[3], elem[4]))
-
-    newListShop.pop(0)
-
-    return newListShop
+    return df

LabWork01/LoadDB.py

@@ -1,22 +1,64 @@
 from flask import Flask, redirect, url_for, request, render_template
-from LabWork01.FuncLoad import createList
+from LabWork01.FuncLoad import createDataFrame
 
 app = Flask(__name__)
 
+#сразу загружаем весь док, чтобы потом просто прыгать по нему
+listShops = createDataFrame()
+
+#список типов данных по столбцам
+listTypes = listShops.dtypes.to_list()
+
+#формируем записи о кол-ве пустых ячеек в каждом столбце
+countNull = listShops.isnull().sum()
+
 @app.route("/")
 def home():
-    return render_template('main_page.html', firstColumn=1, secondColumn=4)
+    return render_template('main_page.html', context=[], listTypes=listTypes, countNull=countNull, firstColumn=1, secondColumn=4)
 
 @app.route("/showDiapason", methods=['GET','POST'])
 def numtext():
     data = request.args
 
-    listShops = createList()
+    #получаем срез и таблицы по введёным параметрам
+    newListShops = listShops.iloc[int(data['firstRow'])-1:int(data['secondRow']), int(data['firstColumn']):int(data['secondColumn'])+1]
+
+    _range = range(int(data['firstColumn']), int(data['secondColumn'])+1)
+
+    #список списков для шаблона
+    totalList = []
+
+    print(countNull[1])
+
+    #формирование 4-х списков для шаблонизатора
+    if 1 in _range:
+        listStoreArea = newListShops['Store_Area'].to_list()
+
+        totalList.append(listStoreArea)
+
+    if 2 in _range:
+        listItemsAvailable = newListShops['Items_Available'].to_list()
+
+        totalList.append(listItemsAvailable)
+
+    if 3 in _range:
+        listDailyCustomerCount = newListShops['Daily_Customer_Count'].to_list()
+
+        totalList.append(listDailyCustomerCount)
+
+    if 4 in _range:
+        listStoreSales = newListShops['Store_Sales'].to_list()
+
+        totalList.append(listStoreSales)
 
     if int(data['firstRow']) and int(data['secondRow']) and int(data['firstColumn']) and int(data['secondColumn']):
-        listShops = listShops[int(data['firstRow']):int(data['secondRow'])+1:1]
+        return render_template('main_page.html', context=totalList, listTypes=listTypes, countNull=countNull,
+                               firstColumn=int(data['firstColumn']), secondColumn=int(data['secondColumn']),
+                               firstRow=int(data['firstRow']), secondRow=int(data['secondRow']))
+
+
+    home()
 
-    return render_template('main_page.html', context=listShops, firstColumn=int(data['firstColumn']), secondColumn=int(data['secondColumn']))
 
 if __name__=="__main__":
     app.run(debug=True)

LabWork01/templates/main_page.html

@@ -23,34 +23,28 @@
     </div>
     <div>
         <table>
+            <tr>
+                {{ countNull }}
+            </tr>
             <tr>
                 {% if firstColumn == 1 %}
-                    <th class="head">Площадь магазина, кв. м, double</th>
+                    <th class="head">Площадь магазина, кв. м, {{ listTypes[1] }}</th>
                 {% endif %}
                 {% if firstColumn <= 2 and secondColumn >= 2 %}
-                    <th class="head">Кол-во продукции, шт, int</th>
+                    <th class="head">Кол-во продукции, шт, {{ listTypes[2] }}</th>
                 {% endif %}
                 {% if firstColumn <= 3 and secondColumn >= 3 %}
-                    <th class="head">Кол-во посетителей в день, чел., int</th>
+                    <th class="head">Кол-во посетителей в день, чел., {{ listTypes[3] }}</th>
                 {% endif %}
                 {% if secondColumn == 4 %}
-                    <th class="head">Кол-во проданных товаров, шт., int</th>
+                    <th class="head">Кол-во проданных товаров, шт., {{ listTypes[4] }}</th>
                 {% endif %}
             </tr>
-            {% for elem in context %}
+            {% for i in range(secondRow - firstRow + 1) %}
                 <tr>
-                    {% if firstColumn == 1 %}
-                        <td>{{ elem.store_area }}</td>
-                    {% endif %}
-                    {% if firstColumn <= 2 and secondColumn >= 2 %}
-                        <td>{{ elem.items_available }}</td>
-                    {% endif %}
-                    {% if firstColumn <= 3 and secondColumn >= 3 %}
-                        <td>{{ elem.daily_customer_count }}</td>
-                    {% endif %}
-                    {% if secondColumn == 4 %}
-                        <td>{{ elem.store_sales }}</td>
-                    {% endif %}
+                    {% for elem in context %}
+                        <td> {{ elem[i] }} </td>
+                    {% endfor %}
                 </tr>
             {% endfor %}
         </table>

res/Stores.csv

@@ -1,4 +1,4 @@
-Store ID ,Store_Area,Items_Available,Daily_Customer_Count,Store_Sales
+Store_ID ,Store_Area,Items_Available,Daily_Customer_Count,Store_Sales
 1,1659,1961,530,66490
 2,1461,1752,210,39820
 3,1340,1609,720,54010