我正在尝试创建带有标记的叶子地图，并且不断收到TypeError：必须为实数，而不是str

Question

data = pd.read_csv("organization.csv", names=['organization_name', 'latitude', 'longitude'])
m = folium.Map(location=[20,0], tiles='Mapbox Bright', zoom_start=2) 
for i in range(len(data)):
   folium.Marker([data.iloc[i]['longitude'], data.iloc[i]['latitude']], popup=data.iloc[i]['organization_name']).add_to(m)

如何解决此错误？

data = pd.read_csv("organization.csv", names=['organization_name', 'latitude', 'longitude']) 
m = folium.Map(location=[20,0], tiles='Mapbox Bright', zoom_start=2) 
for i in range(len(data)): 
    long = float(data.iloc[i]['longitude']) 
    lat = float(data.iloc[i]['latitude']) 
    popup = folium.Popup(data.iloc[i]['organization_name'], parse_html=True) 
    folium.Marker([lat, long], str(popup)).add_to(m)

输出只是一个空白的白框，没有错误消息。