Update app.py

app.py

@@ -42,7 +42,7 @@ def getOutput(inp_vec):
 def main():
 
 	st.title("Welcome to tweet engagement predictor")
-	with st.form("my_form"):
+	with st.form("my_form", clear_on_submit=True):
 		tweet = st.text_input('Enter a tweet')
 		tweet_date = st.date_input("Enter the date of tweeting", 
 			value = datetime(2018,1,1,0,0),