app.py

#import definitions
import pandas as pd
import streamlit as st

df = pd.read_csv('Map-City-State-Zip-Lat-Long.txt', dtype=str, sep=';') 
df["Latitude"] = df["Latitude"].astype(float)
df["Longitude"] = df["Longitude"].astype(float)



st.title("Input a city and state I'll take you there! - Ex. Boston, MA")

city_and_state_string = st.text_input("Please search for a city:")


try: 
    if city_and_state_string != "": 
        
        split_city_state = city_and_state_string.split(", ")
        state_name = split_city_state[1]
        city_name = split_city_state[0]
        
        #create a dataframe consisting of the correct city input
        city_df = df[df["City"] == city_name]
        
        
        #use the city dateframe to confirm you are using the right map
        lat = city_df[city_df["State"] == state_name]["Latitude"].values[0]
        lon = city_df[city_df["State"] == state_name]["Longitude"].values[0]
        #zipCode = city_df[city_df["State"] == state_name]["Zip"].values[0]
        city_list = []
        lat_list = []
        long_list = []
        
    
        city_list.append(city_name)
        lat_list.append(lat)
        long_list.append(lon)
        st.map(pd.DataFrame({'cities' : city_list, 'lat' : lat_list, 'lon' : long_list}))
        st.write(city_name, "is located at: ", lat, ",", lon)
        #st.write("The zip code is: ", zipCode)
        st.write("Would you like to save this location?")
        save_button = st.button("Save")
        
        if save_button:
            st.write("Saved!")
except: 
    st.write("Try Again")