add distance calculator

Author: gwildingmz

calculate_distance.py

@@ -0,0 +1,32 @@
+import streamlit as st
+from geopy import Nominatim, distance
+
+
+def get_coordinates(place_name):
+  geolocator = Nominatim(user_agent="geo_locator")
+  location = geolocator.geocode(place_name)
+  if location:
+    return location.latitude, location.longitude
+  else:
+    return None, None
+
+st.set_page_config(page_title="Calculate distance")
+
+st.write("Please note that the distance calculator is primarily for calculating the distance"
+         " for flight expenses")
+
+with st.form("distance_calculator"):
+    start_city = st.text_input("Starting city")
+    end_city = st.text_input("Destination city")
+
+    return_flight = st.checkbox("Return flight?")
+
+    submitted = st.form_submit_button("Calculate")
+    st.caption("Please note that distance will be calculated to 2 decimal places.")
+
+    if submitted:
+        distance_miles = distance.distance(get_coordinates(start_city), get_coordinates(end_city)).miles
+        st.write("Distance between ", start_city, " and ", end_city, " is: ", round(distance_miles, 2), " miles.")
+
+        if return_flight:
+            st.write("With a return flight, the total distance is ", round((distance_miles * 2), 2), " miles.")

pages/app.py

@@ -6,7 +6,8 @@
 
 help_page = st.Page("get_started.py", title="Get started")
 data_page = st.Page("calculate_data.py", title="Calculate data")
+distance_page = st.Page("calculate_distance.py", title="Calculate distance")
 
 
-pg = st.navigation([help_page, data_page])
+pg = st.navigation([help_page, data_page, distance_page])
 pg.run()