Update app.py

app.py

@@ -7,6 +7,21 @@ import got
 import numpy as np
 import pandas as pd
 
+
+df = pd.read_csv("testfile.csv")
+@st.cache
+def convert_df(df):
+   return df.to_csv().encode('utf-8')
+csv = convert_df(df)
+st.download_button(
+   "Press to Download",
+   csv,
+   "testfile.csv",
+   "text/csv",
+   key='download-csv'
+)
+
+
 st.title('Streamlit Visualization')
 dataframe = pd.DataFrame(np.random.randn(10, 20),
   columns = ('col %d' % i