text: import dash_bootstrap_components as dbc
  import dash_html_components as html
  import dash_core_components as dcc
  
  from dash.dependencies import Input, Output
  
  from cusum import cusumGraph
  from regression import regression
  from GroundFloor import content0
  from floor3 import thirdFloor
  from floor2 import secondFloor
  from floor1 import firstFloor
  from app import app
  
  SIDEBAR_STYLE = {
      "position": "fixed",
      "top": 0,
      "left": 0,
      "bottom": 0,
      "width": "16rem",
      "padding": "2rem 1rem",
      "background-color": "#f8f9fa",
  }
  
  # padding for the page content
  CONTENT_STYLE = {
           "margin-left": "18rem",
           "margin-right": "2rem",
           "padding": "2rem 1rem",
  }
  
  sidebar = html.Div(
      [
          html.H2("Medtech", className="display-4"),
          html.Hr(),
          html.P(
              "Electricity consumption and cost", className="lead"
          ),
          dbc.Nav(
              [
                  dbc.NavLink("Home", href="/", active="exact"),
                  dbc.NavLink("Floor1", href="/floor1", active="exact"),
                  dbc.NavLink("Floor2", href="/floor2", active="exact"),
                  dbc.NavLink("Floor3", href="/floor3", active="exact"),
                  dbc.NavLink("Regression analysis", href="/regression", active="exact"),
                  dbc.NavLink("Cusum analysis", href="/cusum", active="exact")
              ],
              vertical=True,
              pills=True,
          ),
      ],
      style=SIDEBAR_STYLE,
  )
  
  content = html.Div(id="page-content", children=[], style=CONTENT_STYLE)
  
  app.layout = html.Div([
      dcc.Location(id="url"),
      sidebar,
      content
  ])
  
  
  @app.callback(
      Output("page-content", "children"),
      [Input("url", "pathname")]
  )
  def render_page_content(pathname):
      if pathname == "/":
          return [
              content0
          ]
      elif pathname == "/floor1":
          return [
              firstFloor
          ]
      elif pathname == "/floor2":
          return [
              secondFloor
          ]
      elif pathname == "/floor3":
          return [
              thirdFloor
          ]
      elif pathname == "/regression":
          return [
              regression
          ]
      elif pathname == "/cusum":
          return [
              cusumGraph
          ]
  
      # If the user tries to reach a different page, return a 404 message
      return dbc.Jumbotron(
          [
              html.H1("404: Not found", className="text-danger"),
              html.Hr(),
              html.P(f"The pathname {pathname} was not recognised..."),
          ]
      )
  
  
  if __name__ == '__main__':
      app.run_server(debug=True, port=3000)
  