Update app.py

app.py

@@ -1,3 +1,29 @@
+# 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
+
+# Solve a javascript error by explicitly setting the renderer
+alt.renderers.enable('jupyterlab')
+
+#load data 
+# df1=pd.read_csv("https://raw.githubusercontent.com/dallascard/SI649_public/main/altair_hw3/approval_polllist.csv")
+df2=pd.read_csv("https://raw.githubusercontent.com/dallascard/SI649_public/main/altair_hw3/approval_topline.csv")
+
+df2['timestamp']=pd.to_datetime(df2['timestamp'])
+df2=pd.melt(df2, id_vars=['president', 'subgroup', 'timestamp'], value_vars=['approve','disapprove']).rename(columns={'variable':'choice', 'value':'rate'})
+
+
+
 ## Viz 4
 # Import panel and vega datasets