How to use the folium.features.CustomIcon function in folium

def test_custom_icon(self):
        """Test CustomIcon."""
        self.setup()

        icon_image = 'http://leafletjs.com/docs/images/leaf-green.png'
        shadow_image = 'http://leafletjs.com/docs/images/leaf-shadow.png'

        self.m = folium.Map([45, -100], zoom_start=4)
        i = folium.features.CustomIcon(icon_image,
                                       icon_size=(38, 95),
                                       icon_anchor=(22, 94),
                                       shadow_image=shadow_image,
                                       shadow_size=(50, 64),
                                       shadow_anchor=(4, 62),
                                       popup_anchor=(-3, -76),)
        mk = folium.Marker([45, -100], icon=i,
                           popup=folium.Popup('Hello'))
        self.m.add_child(mk)
        self.m._parent.render()

        bounds = self.m.get_bounds()
        assert bounds == [[45, -100], [45, -100]], bounds

folium.Marker([lat, long], icon=icon,
                                  popup=popup).add_to(marker_cluster)
                else:
                    folium.Marker([lat, long], icon=icon,
                                  popup=popup).add_to(folium_map)
            except Exception as e:
                pass

            repeats.append(str_coordinates)


    if service == 'twitter':
        twitter_icon = "https://cdn2.iconfinder.com/data/icons/metro-uinvert-dock/256/Twitter_NEW.png"
        help = 0
        for photo, coords in results.items():
            icon = folium.features.CustomIcon(twitter_icon, icon_size=(35, 35))  # bug
            try:
                if coords in repeats:
                    if photo.startswith("https://"):
                        twitter_icon_green = "https://www.iconsdb.com/icons/preview/green/twitter-xxl.png"

                        icon = folium.features.CustomIcon(twitter_icon_green, icon_size=(35, 35))  # bug
                        html = '<img src="{}" style="width:100%; height:100%;">'.format(photo)
                        popup = folium.Popup(branca.element.IFrame(html=html, width=420, height=320), max_width=2137)

                        folium.Marker([coords[1], coords[0]], icon=icon,
                                      popup=popup).add_to(marker_cluster)
                    else:
                        test = folium.Html(photo, script=False)
                        popup = folium.Popup(test, max_width=2650)

                        folium.Marker([coords[1], coords[0]], icon=icon,

pass

            repeats.append(str_coordinates)


    if service == 'twitter':
        twitter_icon = "https://cdn2.iconfinder.com/data/icons/metro-uinvert-dock/256/Twitter_NEW.png"
        help = 0
        for photo, coords in results.items():
            icon = folium.features.CustomIcon(twitter_icon, icon_size=(35, 35))  # bug
            try:
                if coords in repeats:
                    if photo.startswith("https://"):
                        twitter_icon_green = "https://www.iconsdb.com/icons/preview/green/twitter-xxl.png"

                        icon = folium.features.CustomIcon(twitter_icon_green, icon_size=(35, 35))  # bug
                        html = '<img src="{}" style="width:100%; height:100%;">'.format(photo)
                        popup = folium.Popup(branca.element.IFrame(html=html, width=420, height=320), max_width=2137)

                        folium.Marker([coords[1], coords[0]], icon=icon,
                                      popup=popup).add_to(marker_cluster)
                    else:
                        test = folium.Html(photo, script=False)
                        popup = folium.Popup(test, max_width=2650)

                        folium.Marker([coords[1], coords[0]], icon=icon,
                                      popup=popup).add_to(marker_cluster)
                else:
                    if photo.startswith("https://"):
                        twitter_icon_green = "https://www.iconsdb.com/icons/preview/green/twitter-xxl.png"

                        icon = folium.features.CustomIcon(twitter_icon_green, icon_size=(35, 35))  # bug

if recursive:
                    if ip not in all_ips:

                        print("Checking " + ip)
                        details = get_host_info(ip)
                        str1 = ','.join(details['hostnames'])
                        popup_text = popup_text + "<br> Hostnames: " + str1 + "<br> "
                        str2 = ','.join(str(e) for e in details['ports'])
                        popup_text = popup_text + "Ports: " + str2
                        all_ips.append(ip)

                popup = folium.Popup(popup_text, max_width=2137)

                #Check if device returns 200 OK, i.e. if it's open
                if "200 OK" not in printer['data']:
                    shodan_icon = folium.features.CustomIcon(closed_printer_icon, icon_size=(35, 35))  # bug
                else:
                    shodan_icon = folium.features.CustomIcon(open_printer_icon, icon_size=(35, 35))  # bug

                #if there is more than one device with the same coordinates, add it to cluster
                if coordinates in repeats:
                    folium.Marker([printer['location']['latitude'], printer['location']['longitude']], icon=shodan_icon,
                                  popup=popup).add_to(marker_cluster)
                else:
                    folium.Marker([printer['location']['latitude'], printer['location']['longitude']], icon=shodan_icon,
                                  popup=popup,
                                  ).add_to(folium_map)

                repeats.append(coordinates)  # make list of lists of coordinates

    if service == 'camera':
        closed_camera_icon = "https://www.iconsdb.com/icons/preview/red/security-camera-xxl.png"

if recursive:
                    if ip not in all_ips:

                        print("Checking " + ip)
                        details = get_host_info(ip)
                        str1 = ','.join(details['hostnames'])
                        popup_text = popup_text + "<br> Hostnames: " + str1 + "<br> "
                        str2 = ','.join(str(e) for e in details['ports'])
                        popup_text = popup_text + "Ports: " + str2
                        all_ips.append(ip)

                popup = folium.Popup(popup_text, max_width=2137)

                #Check if device returns 200 OK, i.e. if it's open
                if "Connection Code: 0" not in device['data']:
                    shodan_icon = folium.features.CustomIcon(mqtt_closed_icon, icon_size=(35, 35))  # bug
                else:
                    shodan_icon = folium.features.CustomIcon(mqtt_open_icon, icon_size=(35, 35))  # bug

                #if there is more than one device with the same coordinates, add it to cluster
                if coordinates in repeats:
                    folium.Marker([device['location']['latitude'], device['location']['longitude']], icon=shodan_icon,
                                  popup=popup).add_to(marker_cluster)
                else:
                    folium.Marker([device['location']['latitude'], device['location']['longitude']], icon=shodan_icon,
                                  popup=popup,
                                  ).add_to(folium_map)

                repeats.append(coordinates)  # make list of lists of coordinates


    if service == "printer":

popup_text = ip + "<br>" + str(distance_compare)[
                                                              0:5] + "" + unit + " from target" + "<br><a href="https://shodan.io/host/&quot;">Lookup on Shodan</a>" + " <br> <a href="https://bgp.he.net/ip/&quot;"> Check ownership </a><br>"
                if recursive:
                    print("Checking " + ip)
                    details = get_host_info(ip)
                    str1 = ','.join(details['hostnames'])
                    popup_text = popup_text + "<br> Hostnames: " + str1 + "<br> "
                    str2 = ','.join(str(e) for e in details['ports'])
                    popup_text = popup_text + "Ports: " + str2
                    all_ips.append(ip)

                popup = folium.Popup(html=popup_text, max_width=2137)

                if "200 OK" not in camera['data']:
                    shodan_icon = folium.features.CustomIcon(closed_rtsp_icon, icon_size=(35, 35))  # bug
                else:
                    shodan_icon = folium.features.CustomIcon(open_rtsp_icon, icon_size=(35, 35))  # bug

                if coordinates in repeats:
                    folium.Marker([camera['location']['latitude'], camera['location']['longitude']], icon=shodan_icon,
                                  popup=popup).add_to(marker_cluster)
                else:
                    folium.Marker([camera['location']['latitude'], camera['location']['longitude']], icon=shodan_icon,
                                  popup=popup,
                                  ).add_to(folium_map)

                repeats.append(coordinates)

    if service == 'instagram':
        insta_icon = "http://icons-for-free.com/free-icons/png/512/2329265.png"
        for photo, coordinates in results.items():

org = printer['org']
                version = printer['version']
                popup_text = "<b>" + product + " " + version + "</b> <br>" + org + "<br>" + ip + ":" + str(
                    port) + "<br>" + ports_html + "<a href="http://maps.google.com/maps?q=&amp;layer=c&amp;cbll=&quot;+str(printer['location']['latitude'])+&quot;,&quot;+str(printer['location']['longitude'])"> Go for a walk</a>" + "<br><a href="https://shodan.io/host/&quot;+ip">Shodan details</a>" + html

            except:
                popup_text = ip + ":" + str(
                    port) + "<br>"  + ports_html + "<a href="http://maps.google.com/maps?q=&amp;layer=c&amp;cbll=&quot;+str(printer['location']['latitude'])+&quot;,&quot;+str(printer['location']['longitude'])"> Go for a walk</a>" + "<br><a href="https://shodan.io/host/&quot;+ip">Shodan details</a>" + html

            if "img" in html:
                popup = folium.Popup(branca.element.IFrame(html=popup_text, width=450, height=500), max_width=2137)
            else:
                popup = folium.Popup(popup_text, max_width=2137)


            shodan_icon = folium.features.CustomIcon(factory_icon, icon_size=(35, 35))  # bug

            #if there is more than one device with the same coordinates, add it to cluster
            if coordinates in repeats:
                folium.Marker([printer['location']['latitude'], printer['location']['longitude']], icon=shodan_icon,
                              popup=popup).add_to(marker_cluster)
            else:
                folium.Marker([printer['location']['latitude'], printer['location']['longitude']], icon=shodan_icon,
                              popup=popup,
                              ).add_to(folium_map)

            repeats.append(coordinates)
            # make list of lists of coordinates

        for i in repeats:
            if i not in unique_coordinates_ics:
                unique_coordinates_ics.append(i)

if ip not in all_ips:
                        print("Checking " + ip)
                        details = get_host_info(ip)
                        str1 = ','.join(details['hostnames'])
                        popup_text = popup_text + "<br> Hostnames: " + str1 + "<br> "
                        str2 = ','.join(str(e) for e in details['ports'])
                        popup_text = popup_text + "Ports: " + str2
                        all_ips.append(ip)

                popup = folium.Popup(html=popup_text, max_width=2137)


                if "200 OK" not in camera['data']:
                    shodan_icon = folium.features.CustomIcon(closed_camera_icon, icon_size=(35, 35))  # bug
                else:
                    shodan_icon = folium.features.CustomIcon(open_camera_icon, icon_size=(35, 35))  # bug

                #Check if coordinates are repetitives and if camera has screenshot
                if coordinates in repeats and has_screenshot ==1:
                        folium.Marker([camera['location']['latitude'], camera['location']['longitude']], icon=shodan_icon, popup=popup).add_to(marker_cluster)
                elif coordinates in repeats and has_screenshot ==0:
                        folium.Marker([camera['location']['latitude'], camera['location']['longitude']],icon=shodan_icon,
                                  popup=popup,
                                  ).add_to(marker_cluster)
                elif coordinates not in repeats and has_screenshot ==1:
                    folium.Marker([camera['location']['latitude'], camera['location']['longitude']], icon=shodan_icon, popup=popup,
                                  ).add_to(folium_map)
                else:
                    folium.Marker([camera['location']['latitude'], camera['location']['longitude']], icon=shodan_icon, popup=popup).add_to(folium_map)

                    repeats.append(coordinates)  # make list of lists of coordinates

shodan_icon = folium.features.CustomIcon(open_rtsp_icon, icon_size=(35, 35))  # bug

                if coordinates in repeats:
                    folium.Marker([camera['location']['latitude'], camera['location']['longitude']], icon=shodan_icon,
                                  popup=popup).add_to(marker_cluster)
                else:
                    folium.Marker([camera['location']['latitude'], camera['location']['longitude']], icon=shodan_icon,
                                  popup=popup,
                                  ).add_to(folium_map)

                repeats.append(coordinates)

    if service == 'instagram':
        insta_icon = "http://icons-for-free.com/free-icons/png/512/2329265.png"
        for photo, coordinates in results.items():
            icon = folium.features.CustomIcon(insta_icon, icon_size=(35, 35))  # bug
            html = '<img src="{}" style="width:100%; height:100%;">'.format(str(photo))
            popup = folium.Popup(branca.element.IFrame(html=html, width=420, height=320), max_width=2137)
            if coordinates in repeats:
                folium.Marker([coordinates[0], coordinates[1]], icon=icon,
                              popup=popup).add_to(marker_cluster)
            else:
                folium.Marker([coordinates[0], coordinates[1]], icon=icon,
                              popup=popup).add_to(folium_map)

            repeats.append(coordinates)

    if service == 'flickr':
        flickr_icon = "http://www.myiconfinder.com/uploads/iconsets/f425a318030877cc09cb7832bea3e2c8.png"
        for flickr_photo in results:
            icon = folium.features.CustomIcon(flickr_icon, icon_size=(35, 35))