Replaced requests.get by s.get, in order to make use of HTTP(S) proxies

a4ae4953 · Alessandro Cerioni · 1fd39b4f · a4ae4953
Commit a4ae4953 authored 6 years ago by Alessandro Cerioni
--- a/1_collecte_donnee.ipynb
+++ b/1_collecte_donnee.ipynb
@@ -95,7 +95,9 @@
  {
   "cell_type": "code",
   "execution_count": 13,
-   "metadata": {},
+   "metadata": {
+    "collapsed": true
+   },
   "outputs": [],
   "source": [
    "res = s.get(url)"
@@ -478,7 +480,7 @@
    "    url = build_url(le_nombre_de_enregistrements_par_page, i)\n",
    "    print(i, url)\n",
    "    \n",
-    "    res = requests.get(url)\n",
+    "    res = s.get(url)\n",
    "    data = res.json()\n",
    "    records += data['features']\n",
    "\n",

 %% Cell type:markdown id: tags:
 # 1 - Collecte des données
 %% Cell type:markdown id: tags:
 Nous allons avoir besoin des modules suivants :
 %% Cell type:code id: tags:
 ``` python
 import requests
 import json
 ```
 %% Cell type:markdown id: tags:
 ...et des proxies HTTP(S) qui vont bien :
 %% Cell type:code id: tags:
 ``` python
 proxies = {
    'http': 'http://proxyhttp1pro:8080',
    'https': 'http://proxyhttp1pro:8080'
 }
 s = requests.Session()
 ```
 %% Cell type:code id: tags:
 ``` python
 s.proxies = proxies
 ```
 %% Cell type:markdown id: tags:
 ##  Préambule
 %% Cell type:markdown id: tags:
 Nous souhaitons collecter les données relatives au jeu de données présenté ici : https://data.beta.grandlyon.com/fr/datasets/arbres-alignement-metropole-lyon/info. Le portail data.grandlyon.com peut nous fournir un exemple de requête WFS permettant de récupérer 30 enregistrements dans le format GeoJSON. Voici cette URL:
 %% Cell type:code id: tags:
 ``` python
 url = "https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=30"
 ```
 %% Cell type:markdown id: tags:
 La commande suivante permet d'effectuer une requête HTTP vers cette URL, et de stocker le résultat dans la variable `res` :
 %% Cell type:code id: tags:
 ``` python
 res = s.get(url)
 ```
 %% Cell type:markdown id: tags:
 On peut consulter le "status code" de la requête comme suit :
 %% Cell type:code id: tags:
 ``` python
 res.status_code
 ```
 %% Output
    200
 %% Cell type:markdown id: tags:
 Si le status code est égal à 200, alors c'est bon : la requête a réussi !
 %% Cell type:markdown id: tags:
 La commande suivante permet de stocker la réponse de la requête dans la variable `data`, au format JSON :
 %% Cell type:code id: tags:
 ``` python
 data = res.json()
 ```
 %% Cell type:markdown id: tags:
 Afin de visualiser son contenu, vous pouvez décommenter la ligne suivante et l'exécuter :
 %% Cell type:code id: tags:
 ``` python
 #data
 ```
 %% Cell type:code id: tags:
 ``` python
 data.keys()
 ```
 %% Output
    dict_keys(['features', 'type', 'name', 'crs'])
 %% Cell type:markdown id: tags:
 Les données qui nous intéressent se trouvent dans la clé `features` du dictionnaire `data` :
 %% Cell type:code id: tags:
 ``` python
 records = data['features']
 ```
 %% Cell type:markdown id: tags:
 Comme "promis", nous avons collecté 30 enregistrements :
 %% Cell type:code id: tags:
 ``` python
 len(data['features'])
 ```
 %% Output
    30
 %% Cell type:markdown id: tags:
 ## Collecte "paginée" des données
 %% Cell type:markdown id: tags:
 On introduit une fonction qui permet de construire les URLs relatives aux différentes pages que nous devons consulter :
 %% Cell type:code id: tags:
 ``` python
 def build_url(maxfeatures_per_page, page_no):
    if page_no < 1:
        raise Exception('page_no has to be greater than 1!')
    startindex = maxfeatures_per_page * (page_no-1)
    root_url = "https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326"
    url = root_url + "&maxfeatures=%i&startindex=%i" % (maxfeatures_per_page, startindex)
    return url
 ```
 %% Cell type:markdown id: tags:
 URL pour la première page de 100 éléments :
 %% Cell type:code id: tags:
 ``` python
 build_url(100, 2)
 ```
 %% Output
    'https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=100&startindex=100'
 %% Cell type:markdown id: tags:
 URL pour la déuxième page de 1000 éléments :
 %% Cell type:code id: tags:
 ``` python
 build_url(1000, 2)
 ```
 %% Output
    'https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=1000'
 %% Cell type:markdown id: tags:
 La commande `range(a, b)` permet de générer la liste de numéros entiers allant de `a` à `b`:
 %% Cell type:code id: tags:
 ``` python
 list(range(1, 10))
 ```
 %% Output
    [1, 2, 3, 4, 5, 6, 7, 8, 9]
 %% Cell type:markdown id: tags:
 Le jeu de donnée en question incluant un peu plus que 94000 enregistrements, on aura besoin de pas plus que 95 pages de 1000 éléments :
 %% Cell type:code id: tags:
 ``` python
 le_nombre_de_enregistrements_par_page = 1000
 # on utilisera la variable suivante pour comuler les réponses des différentes requêtes :
 records = []
 for i in range(1, 96):
    url = build_url(le_nombre_de_enregistrements_par_page, i)
    print(i, url)
-    res = requests.get(url)
+    res = s.get(url)
    data = res.json()
    records += data['features']
    if len(data['features']) < le_nombre_de_enregistrements_par_page:
        # cela veut dire que nous avons atteint la dernière page !
        break
 ```
 %% Output
    1 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=0
    2 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=1000
    3 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=2000
    4 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=3000
    5 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=4000
    6 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=5000
    7 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=6000
    8 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=7000
    9 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=8000
    10 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=9000
    11 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=10000
    12 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=11000
    13 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=12000
    14 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=13000
    15 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=14000
    16 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=15000
    17 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=16000
    18 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=17000
    19 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=18000
    20 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=19000
    21 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=20000
    22 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=21000
    23 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=22000
    24 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=23000
    25 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=24000
    26 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=25000
    27 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=26000
    28 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=27000
    29 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=28000
    30 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=29000
    31 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=30000
    32 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=31000
    33 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=32000
    34 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=33000
    35 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=34000
    36 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=35000
    37 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=36000
    38 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=37000
    39 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=38000
    40 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=39000
    41 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=40000
    42 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=41000
    43 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=42000
    44 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=43000
    45 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=44000
    46 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=45000
    47 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=46000
    48 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=47000
    49 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=48000
    50 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=49000
    51 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=50000
    52 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=51000
    53 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=52000
    54 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=53000
    55 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=54000
    56 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=55000
    57 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=56000
    58 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=57000
    59 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=58000
    60 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=59000
    61 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=60000
    62 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=61000
    63 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=62000
    64 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=63000
    65 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=64000
    66 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=65000
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    87 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=86000
    88 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=87000
    89 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=88000
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    93 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=92000
    94 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=93000
    95 https://download.data.grandlyon.com/wfs/grandlyon?SERVICE=WFS&VERSION=2.0.0&outputFormat=application/json; subtype=geojson&request=GetFeature&typename=abr_arbres_alignement.abrarbre&SRSNAME=EPSG:4326&maxfeatures=1000&startindex=94000
 %% Cell type:markdown id: tags:
 La commande suivante nous permet de stocker les données dans un fichier le résultat des requêtes précedentes :
 %% Cell type:code id: tags:
 ``` python
 filename = 'data/arbres_alignement_Lyon.json'
 with open(filename, 'w') as fp:
        json.dump(records, fp)
 ```
 %% Cell type:markdown id: tags:
 On utilisera ce fichier comme entrée des cahiers suivants...
 %% Cell type:code id: tags:
 ``` python
 ```