Folium Choropleth + GeoJSON löst AttributeError: 'NoneType'

Question

Ich versuche eine Choropleth unter Verwendung folium zu tun, die eine große Verbindung zwischen GeoJSON, Pandas und Broschüre anbietet.

GeoJSON Format ist wie folgt:

{ 
    "type":"FeatureCollection", 
    "features":[ 
     { 
      "type":"Feature", 
      "geometry": 
      { 
       "type":"Polygon", 
       "coordinates":[[[-1.6704591323124895,49.62681486270549], ..... 
       { 
        "insee":"50173", 
        "nom":"Équeurdreville-Hainneville", 
        "wikipedia":"fr:Équeurdreville-Hainneville", 
        "surf_m2":12940306}}, 

Pandas Datenrahmen:

postal_count.head(5) 
Out[98]: 
    Code_commune_INSEE CP_count 
0    75120  723 
1    75115  698 
2    75112  671 
3    75118  627 
4    75111  622 

"Code_communes_INSEE" entspricht dem Attribut "insee" im GeoJSON. Ich möchte eine Choropleth mit der Variable "CP_count" im obigen DataFrame machen.

Hier ist mein Code (Code-Schnipsel aus this notebook)

map_france = folium.Map(location=[47.000000, 2.000000], zoom_start=6) 
map_france.choropleth(
        geo_str=open(geo_path + 'simplified_communes100m.json').read(), 
        data=postal_count, 
        columns=['Code_commune_INSEE', 'CP_count'], 
        key_on='feature.geometry.properties.insee', 
        fill_color='YlGn', 
) 
map_france.save(table_path + 'choro_test1.html') 

Ich bin immer noch diesen Fehler wieder immer wieder:

--------------------------------------------------------------------------- 
AttributeError       Traceback (most recent call last) 
<ipython-input-83-ea0fd2c1c207> in <module>() 
     8      fill_color='YlGn', 
     9) 
---> 10 map_france.save('/media/flo/Stockage/Data/MesAides/map/choro_test1.html') 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/folium/element.py in save(self, outfile, close_file, **kwargs) 
    151 
    152   root = self.get_root() 
--> 153   html = root.render(**kwargs) 
    154   fid.write(html.encode('utf8')) 
    155   if close_file: 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/folium/element.py in render(self, **kwargs) 
    357   """Renders the HTML representation of the element.""" 
    358   for name, child in self._children.items(): 
--> 359    child.render(**kwargs) 
    360   return self._template.render(this=self, kwargs=kwargs) 
    361 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/folium/element.py in render(self, **kwargs) 
    665 
    666   for name, element in self._children.items(): 
--> 667    element.render(**kwargs) 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/folium/element.py in render(self, **kwargs) 
    661   script = self._template.module.__dict__.get('script', None) 
    662   if script is not None: 
--> 663    figure.script.add_children(Element(script(self, kwargs)), 
    664          name=self.get_name()) 
    665 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/jinja2/runtime.py in __call__(self, *args, **kwargs) 
    434    raise TypeError('macro %r takes not more than %d argument(s)' % 
    435        (self.name, len(self.arguments))) 
--> 436   return self._func(*arguments) 
    437 
    438  def __repr__(self): 

<template> in macro(l_this, l_kwargs) 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/jinja2/runtime.py in call(_Context__self, _Context__obj, *args, **kwargs) 
    194     args = (__self.environment,) + args 
    195   try: 
--> 196    return __obj(*args, **kwargs) 
    197   except StopIteration: 
    198    return __self.environment.undefined('value was undefined because ' 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/folium/features.py in style_data(self) 
    352 
    353   for feature in self.data['features']: 
--> 354    feature.setdefault('properties', {}).setdefault('style', {}).update(self.style_function(feature)) # noqa 
    355   return json.dumps(self.data, sort_keys=True) 
    356 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/folium/folium.py in style_function(x) 
    671     "color": line_color, 
    672     "fillOpacity": fill_opacity, 
--> 673     "fillColor": color_scale_fun(x) 
    674    } 
    675 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/folium/folium.py in color_scale_fun(x) 
    659    def color_scale_fun(x): 
    660     return color_range[len(
--> 661      [u for u in color_domain if 
    662      u <= color_data[get_by_key(x, key_on)]])] 
    663   else: 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/folium/folium.py in <listcomp>(.0) 
    660     return color_range[len(
    661      [u for u in color_domain if 
--> 662      u <= color_data[get_by_key(x, key_on)]])] 
    663   else: 
    664    def color_scale_fun(x): 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/folium/folium.py in get_by_key(obj, key) 
    655     return (obj.get(key, None) if len(key.split('.')) <= 1 else 
    656       get_by_key(obj.get(key.split('.')[0], None), 
--> 657         '.'.join(key.split('.')[1:]))) 
    658 
    659    def color_scale_fun(x): 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/folium/folium.py in get_by_key(obj, key) 
    655     return (obj.get(key, None) if len(key.split('.')) <= 1 else 
    656       get_by_key(obj.get(key.split('.')[0], None), 
--> 657         '.'.join(key.split('.')[1:]))) 
    658 
    659    def color_scale_fun(x): 

/home/flo/.virtualenvs/mesaides/lib/python3.4/site-packages/folium/folium.py in get_by_key(obj, key) 
    653 
    654    def get_by_key(obj, key): 
--> 655     return (obj.get(key, None) if len(key.split('.')) <= 1 else 
    656       get_by_key(obj.get(key.split('.')[0], None), 
    657         '.'.join(key.split('.')[1:]))) 

AttributeError: 'NoneType' object has no attribute 'get' 

Ich habe versucht, mit key_on='feature.geometry.properties.insee' ohne Erfolg zu spielen.

Answer 1

Es waren zwei Probleme:

1 - Der richtige Zugang zu ‚INSEE‘ Parametern ist: key_on='feature.properties.insee'

Der beste Weg, das Recht zu finden key_on ist mit dem GeoJSON dict zu spielen, um sicherzustellen, dass Sie die richtigen Eigenschaften aufrufen.

2- Sobald Sie die richtigen key_on Parameter haben, müssen Sie sicherstellen, dass alle verfügbaren Tasten im GeoJSON in Ihrer Pandas Datenrahmen enthalten sind

In diesem Fall (sonst wird es eine KeyError erhöhen) benutzte ich die folgende Befehlszeile alle insee Schlüssel von meinem GeoJSON enthalten zu bekommen:

ogrinfo -ro -al communes-20150101-100m.shp -geom=NO | grep insee > list_code_insee.txt 

Wenn Sie das gleiche Problem auftritt, das Ihr Problem lösen sollte.