Update app.py

app.py

@@ -8,18 +8,16 @@ df = pd.read_csv('Map-City-State-Zip-Lat-Long.txt', dtype=str, sep=';')
 st.title("Input a city or zip code and we will take you there!")
 
 city_name = st.text_input("Please search for a city:")
-lat = df[df["City"] == city_name]["Latitude"].values[0]
-lon = df[df["City"] == city_name]["Longitude"].values[0]
 
-
-st.write(lat)
-st.write(lon)
-
-
-
-city_list = []
-lat_list = []
-long_list = []
+if city_name != "": 
+    lat = df[df["City"] == city_name]["Latitude"].values[0]
+    lon = df[df["City"] == city_name]["Longitude"].values[0]
+    
+    st.write(lat)
+    st.write(lon)
+    city_list = []
+    lat_list = []
+    long_list = []
 
 
     #city_list.append(city_name)