app.py

from flask import Flask, render_template, url_for
import pandas as pd
import folium

app = Flask(__name__)

@app.route("/")
def index():
    # https://stackoverflow.com/questions/37379374/insert-the-folium-maps-into-the-jinja-template
    start_coords = (41.3874, 2.1686)
    folium_map = folium.Map(location=start_coords, zoom_start=8, width="100%", height="100%", prefer_canvas=True)
    df = pd.read_csv('catsalut/farmacies_geocoded.csv')
    df.dropna(subset =['lat', 'lng'], inplace=True)
    provincies = ["Barcelona", "Girona", "Lleida", "Tarragona"]
    for provincia in provincies: 
        geogson = f"amb-capital/data/{provincia.lower()}_comarques.geojson"
        group = folium.FeatureGroup(name=f"{provincia}") 
        folium.GeoJson(geogson).add_to(group)
        farmacies = df[df['província']==provincia]
        farmacies.apply(lambda row: folium.Marker(location=[row['lat'], row['lng']], popup=row['Codi farm'], icon=folium.Icon(color="red", icon="plus", prefix='fa')).add_to(group), axis=1)
        group.add_to(folium_map)
    folium.LayerControl().add_to(folium_map)
    return render_template('index.html', folium_map=folium_map._repr_html_())

if __name__ == '__main__':
    app.run(debug=True, port=5000)