There seems to be a bug in the _validate_function in folium\features.py
When I add an attribute called 'color' to my json data for using it afterwards in the style function the _validate_function doesn't pass:
area_json = json.load( open(area_file) )
area_json['color'] = my_color_function(area)
gj = folium.GeoJson(area_json, name = area,
style_function = lambda feature: {
'fillColor': feature['geometry']['color']
}
)The loaded JSON file contains just the geometry: {"type": "Polygon", "coordinates": [ ... ]}
If I try to access directly to color in the style function ( pythonstyle_function = lambda feature: { 'fillColor': feature['color'] } ) the _validate_function test passes, but it will cause an error when saving the map, because folium tries to read from feature['color'] while it's in feature['geometry']['color'] after creating the folium GeoJson object.
If I just change the _validate_function for accepting both ways, e.g. like this (in a dirty way):
try:
if isinstance(func(test_feature), dict):
return
except:
pass
try:
if isinstance(func({'geometry': test_feature}), dict):
return
except:
passEverything works as expected.
So is there something to fix in this function or is folium just not designed for handling geojson data in the format of {"type": "Polygon", "coordinates": [ ... ]} without the brackets for feature etc around it?
Output of folium.__version__
0.8.3
There seems to be a bug in the _validate_function in folium\features.py
When I add an attribute called 'color' to my json data for using it afterwards in the style function the _validate_function doesn't pass:
The loaded JSON file contains just the geometry:
{"type": "Polygon", "coordinates": [ ... ]}If I try to access directly to color in the style function (
pythonstyle_function = lambda feature: { 'fillColor': feature['color'] }) the _validate_function test passes, but it will cause an error when saving the map, because folium tries to read from feature['color'] while it's in feature['geometry']['color'] after creating the folium GeoJson object.If I just change the _validate_function for accepting both ways, e.g. like this (in a dirty way):
Everything works as expected.
So is there something to fix in this function or is folium just not designed for handling geojson data in the format of
{"type": "Polygon", "coordinates": [ ... ]}without the brackets for feature etc around it?Output of
folium.__version__0.8.3