Update app.py

app.py

@@ -3,4 +3,23 @@ import streamlit as st
 x = st.slider('Select x value')
 st.write(x, 'squared is', x * x)
 y = st.slider('Select y value')
-st.write(y, 'times two is', y + y)
+st.write(y, 'times two is', y + y)
+
+DATE_COLUMN = 'date/time'
+DATA_URL = ('https://s3-us-west-2.amazonaws.com/'
+         'streamlit-demo-data/uber-raw-data-sep14.csv.gz')
+
+def load_data(nrows):
+    data = pd.read_csv(DATA_URL, nrows=nrows)
+    lowercase = lambda x: str(x).lower()
+    data.rename(lowercase, axis='columns', inplace=True)
+    data[DATE_COLUMN] = pd.to_datetime(data[DATE_COLUMN])
+    return data
+    
+    # Create a text element and let the reader know the data is loading.
+data_load_state = st.text('Loading data...')
+# Load 10,000 rows of data into the dataframe.
+data = load_data(10000)
+# Notify the reader that the data was successfully loaded.
+data_load_state.text('Loading data...done!')
+