How to use the folium.Popup function in folium

"""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

def test_feature_group(self):
        """Test FeatureGroup."""

        m = folium.Map()
        feature_group = folium.FeatureGroup()
        feature_group.add_child(folium.Marker([45, -30],
                                              popup=folium.Popup('-30')))
        feature_group.add_child(folium.Marker([45, 30],
                                              popup=folium.Popup('30')))
        m.add_child(feature_group)
        m.add_child(folium.LayerControl())

        m._repr_html_()

        bounds = m.get_bounds()
        assert bounds == [[45, -30], [45, 30]], bounds

def test_marker_popups():
    m = Map()
    folium.Marker([45, -180], popup='-180').add_to(m)
    folium.Marker([45, -120], popup=Popup('-120')).add_to(m)
    folium.RegularPolygonMarker([45, -60], popup='-60').add_to(m)
    folium.RegularPolygonMarker([45, 0], popup=Popup('0')).add_to(m)
    folium.CircleMarker([45, 60], popup='60').add_to(m)
    folium.CircleMarker([45, 120], popup=Popup('120')).add_to(m)
    folium.CircleMarker([45, 90], popup=Popup('90'), weight=0).add_to(m)
    m._repr_html_()

    bounds = m.get_bounds()
    assert bounds == [[45, -180], [45, 120]], bounds

def test_feature_group(self):
        """Test FeatureGroup."""

        m = folium.Map()
        feature_group = folium.FeatureGroup()
        feature_group.add_child(folium.Marker([45, -30],
                                              popup=folium.Popup('-30')))
        feature_group.add_child(folium.Marker([45, 30],
                                              popup=folium.Popup('30')))
        m.add_child(feature_group)
        m.add_child(folium.LayerControl())

        m._repr_html_()

        bounds = m.get_bounds()
        assert bounds == [[45, -30], [45, 30]], bounds

coords = info['coordinates']
        coords = inverse_coordinates(coords)

        if data:
            # Try to get the image scale
            scale = data.projection().nominalScale().getInfo() if not scale else scale

            # Reduce if computed scale is too big
            scale = 1 if scale > 500 else scale

            values = tools.image.get_value(data, geometry, scale, 'client')
            val_str = ''
            for key, val in values.items():
                val_str += '<b>{}:</b> {}<br>'.format(key, val)
                marker = folium.Marker(location=coords,
                                       popup=folium.Popup(val_str))
        else:
            marker = folium.Marker(location=coords)

        self.add_child(marker)

for tweet in results['statuses']:
		if tweet.get('geo') is None:
			continue
		photo_lat, photo_lon = tweet['geo']['coordinates']
		media_url = next((e[0]['media_url'] for e in tweet['entities'] if 'media' in e), None)
		if media_url is None:
			continue
		photos = [media_url]
		distance = vincenty((lat, lon), (photo_lat, photo_lon)).meters
		if int(distance) <= radius:
			iframe = get_frame(photos)

			folium.CircleMarker(
				location=[photo_lat, photo_lon],
				radius=3,
				popup=folium.Popup(iframe, max_width=2650),
				color='Red',
				fill_opacity=1.0,
				fill_color='Red'
			).add_to(maps)

	return maps

u = user
            try:
                ncluster = row[constants.CLUSTER]
                cl = '<br>Cluster: {}'.format(ncluster)
                color = get_color(ncluster)
            except (KeyError, NameError):
                cl = ''

            fpoly = folium.RegularPolygonMarker([la, lo],
                                        radius=radius,
                                        color=color,
                                        fill_color=color,
                                        fill_opacity=opacity
                                        )
            if popup:
                popup = folium.Popup('User: {}<br>Coord: <a href="https://www.google.co.uk/maps/place/{},{}">{}, {}</a><br>Arr: {}<br>Dep: {}{}' \
                    .format(u, la, lo, np.round(la, 4), np.round(lo, 4),
                            pd.datetime.strftime(t0, '%Y/%m/%d %H:%M'),
                            pd.datetime.strftime(t1, '%Y/%m/%d %H:%M'), cl), max_width=300)
                fpoly = fpoly.add_child(popup)

            fpoly.add_to(map_f)

    return map_f

name = 'origin: %s' % O.replace('\'', '_')
            T_D = [[T, D] for D, T in OD[[constants.DESTINATION, constants.FLOW]].values]
            trips_info = '<br>'.join(["flow to %s: %s" %
                                       (dd.replace('\'', '_'), int(tt)) \
                                       for tt, dd in sorted(T_D, reverse=True)[:num_od_popup]])

            geom = fdf.get_geometry(O)
            lonO, latO = utils.get_geom_centroid(geom)
            fmarker = folium.CircleMarker([latO, lonO],
                                          radius=radius_origin_point,
                                          weight=2,
                                          color=color_origin_point,
                                          fill=True, fill_color=color_origin_point
                                          )
            if tile_popup:
                popup = folium.Popup(name+'<br>'+trips_info, max_width=300)
                fmarker = fmarker.add_child(popup)
            fmarker.add_to(map_f)

    return map_f

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))


            str_coordinates = str(flickr_photo['latitude']) + ',' + str(flickr_photo['longitude'])