How to set the marker color when using geojson.Feature
Question: I am using python and my code is like:

    
    
    from geojson import Feature, FeatureCollection
    import json 
    import sys, pymongo
    
    db = pymongo.MongoClient(host = '..........').database
    coll_name = sys.argv[1]
    point_list = []
    citymap_cursor = db[coll_name].find()
    
    for doc in citymap_cursor:
        point_list.append(Feature(geometry=doc['point_latlng']))
    
    with open('/path to/%s.json' % coll_name, 'w+') as outfile:
        json.dump(FeatureCollection(point_list), outfile)
    

By this code I got a batch of points and I can use geojson.io to visualize the
points. Now these point markers are grey on geojson.io but I want them to be
red. I want to know whether these is an attribute about color in
geojson.Feature so that I can adjust the marker color?


Answer: Yes, you can manipulate the marker colors with a `marker-color` key inside the
`properties` object. You pass it a hex color like `{"marker-color":"#FFF"}`. I
assume you will be doing this inside your `for doc in citymap_cursor:` loop -
something like
`point_list.append(Feature(geometry=doc['point_latlng'],properties={'marker-
color':'#FFF'}))`

