Update app.py

app.py

@@ -1,19 +1,17 @@
 # start with the setup
 
 # supress warnings about future deprecations
-import warnings
-warnings.simplefilter(action='ignore', category=FutureWarning)
-
 import pandas as pd
 import altair as alt
 import numpy as np
 import pprint
 import datetime as dt
 from vega_datasets import data
-import matplotlib.pyplot as plt
+import panel as pn
+import vega_datasets
 
 # Solve a javascript error by explicitly setting the renderer
-alt.renderers.enable('jupyterlab')
+
 #load data 
 df2=pd.read_csv("https://raw.githubusercontent.com/dallascard/SI649_public/main/altair_hw3/approval_topline.csv")
 # Import panel and vega datasets
@@ -22,7 +20,10 @@ import panel as pn
 import vega_datasets
 
 # Enable Panel extensions
-pn.extension()
+pn.extension(design='bootstrap')
+template = pn.template.BootstrapTemplate(
+    title='SI649 Lab7',
+)
 maincol = pn.Column()
 # Define a function to create and return a plot
 
@@ -76,6 +77,6 @@ maincol.append(subgroup_widget)
 maincol.append(date_slider)
 maincol.append(window_widget)
 maincol.append(bound_plot)
-
+template.main.append(maincol)
 # set the app to be servable
-maincol.servable()
+template.servable(title="SI649 Lab7")