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Parsen verschachtelten JSON aus der Foursquare-API

2017-03-20 2 views
2

Ich versuche, eine JSON-Antwort von Foursquare analysieren. Es ist so verschachtelt, dass ich es nicht verstehen kann. Here's a copy of the entire JSON.Parsen verschachtelten JSON aus der Foursquare-API

Hier ist ein Ausschnitt aus der JSON:

{ 
"meta": { 
    "code": 200, 
    "requestId": "58cab8bc4434b959e2f68a69" 
}, 
"response": { 
    "categories": [ 
     { 
      "categories": [ 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/default_", 
         "suffix": ".png" 
        }, 
        "id": "56aa371be4b08b9a8d5734db", 
        "name": "Amphitheater", 
        "pluralName": "Amphitheaters", 
        "shortName": "Amphitheater" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/aquarium_", 
         "suffix": ".png" 
        }, 
        "id": "4fceea171983d5d06c3e9823", 
        "name": "Aquarium", 
        "pluralName": "Aquariums", 
        "shortName": "Aquarium" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/arcade_", 
         "suffix": ".png" 
        }, 
        "id": "4bf58dd8d48988d1e1931735", 
        "name": "Arcade", 
        "pluralName": "Arcades", 
        "shortName": "Arcade" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/artgallery_", 
         "suffix": ".png" 
        }, 
        "id": "4bf58dd8d48988d1e2931735", 
        "name": "Art Gallery", 
        "pluralName": "Art Galleries", 
        "shortName": "Art Gallery" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/bowling_", 
         "suffix": ".png" 
        }, 
        "id": "4bf58dd8d48988d1e4931735", 
        "name": "Bowling Alley", 
        "pluralName": "Bowling Alleys", 
        "shortName": "Bowling Alley" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/casino_", 
         "suffix": ".png" 
        }, 
        "id": "4bf58dd8d48988d17c941735", 
        "name": "Casino", 
        "pluralName": "Casinos", 
        "shortName": "Casino" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/default_", 
         "suffix": ".png" 
        }, 
        "id": "52e81612bcbc57f1066b79e7", 
        "name": "Circus", 
        "pluralName": "Circuses", 
        "shortName": "Circus" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/comedyclub_", 
         "suffix": ".png" 
        }, 
        "id": "4bf58dd8d48988d18e941735", 
        "name": "Comedy Club", 
        "pluralName": "Comedy Clubs", 
        "shortName": "Comedy Club" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/musicvenue_", 
         "suffix": ".png" 
        }, 
        "id": "5032792091d4c4b30a586d5c", 
        "name": "Concert Hall", 
        "pluralName": "Concert Halls", 
        "shortName": "Concert Hall" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/performingarts_dancestudio_", 
         "suffix": ".png" 
        }, 
        "id": "52e81612bcbc57f1066b79ef", 
        "name": "Country Dance Club", 
        "pluralName": "Country Dance Clubs", 
        "shortName": "Country Dance Club" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/default_", 
         "suffix": ".png" 
        }, 
        "id": "52e81612bcbc57f1066b79e8", 
        "name": "Disc Golf", 
        "pluralName": "Disc Golf Courses", 
        "shortName": "Disc Golf" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/default_", 
         "suffix": ".png" 
        }, 
        "id": "56aa371be4b08b9a8d573532", 
        "name": "Exhibit", 
        "pluralName": "Exhibits", 
        "shortName": "Exhibit" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/default_", 
         "suffix": ".png" 
        }, 
        "id": "4bf58dd8d48988d1f1931735", 
        "name": "General Entertainment", 
        "pluralName": "General Entertainment", 
        "shortName": "Entertainment" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/racetrack_", 
         "suffix": ".png" 
        }, 
        "id": "52e81612bcbc57f1066b79ea", 
        "name": "Go Kart Track", 
        "pluralName": "Go Kart Tracks", 
        "shortName": "Go Kart" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/historicsite_", 
         "suffix": ".png" 
        }, 
        "id": "4deefb944765f83613cdba6e", 
        "name": "Historic Site", 
        "pluralName": "Historic Sites", 
        "shortName": "Historic Site" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/nightlife/karaoke_", 
         "suffix": ".png" 
        }, 
        "id": "5744ccdfe4b0c0459246b4bb", 
        "name": "Karaoke Box", 
        "pluralName": "Karaoke Boxes", 
        "shortName": "Karaoke" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/default_", 
         "suffix": ".png" 
        }, 
        "id": "52e81612bcbc57f1066b79e6", 
        "name": "Laser Tag", 
        "pluralName": "Laser Tag Places", 
        "shortName": "Laser Tag" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/historicsite_", 
         "suffix": ".png" 
        }, 
        "id": "5642206c498e4bfca532186c", 
        "name": "Memorial Site", 
        "pluralName": "Memorial Sites", 
        "shortName": "Memorial Site" 
       }, 
       { 
        "categories": [], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/parks_outdoors/golfcourse_", 
         "suffix": ".png" 
        }, 
        "id": "52e81612bcbc57f1066b79eb", 
        "name": "Mini Golf", 
        "pluralName": "Mini Golf Courses", 
        "shortName": "Mini Golf" 
       }, 
       { 
        "categories": [ 
         { 
          "categories": [], 
          "icon": { 
           "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/movietheater_", 
           "suffix": ".png" 
          }, 
          "id": "56aa371be4b08b9a8d5734de", 
          "name": "Drive-in Theater", 
          "pluralName": "Drive-in Theaters", 
          "shortName": "Drive-in Theater" 
         }, 
         { 
          "categories": [], 
          "icon": { 
           "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/movietheater_", 
           "suffix": ".png" 
          }, 
          "id": "4bf58dd8d48988d17e941735", 
          "name": "Indie Movie Theater", 
          "pluralName": "Indie Movie Theaters", 
          "shortName": "Indie Movies" 
         }, 
         { 
          "categories": [], 
          "icon": { 
           "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/movietheater_", 
           "suffix": ".png" 
          }, 
          "id": "4bf58dd8d48988d180941735", 
          "name": "Multiplex", 
          "pluralName": "Multiplexes", 
          "shortName": "Cineplex" 
         } 
        ], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/movietheater_", 
         "suffix": ".png" 
        }, 
        "id": "4bf58dd8d48988d17f941735", 
        "name": "Movie Theater", 
        "pluralName": "Movie Theaters", 
        "shortName": "Movie Theater" 
       }, 
       { 
        "categories": [ 
         { 
          "categories": [], 
          "icon": { 
           "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/museum_art_", 
           "suffix": ".png" 
          }, 
          "id": "4bf58dd8d48988d18f941735", 
          "name": "Art Museum", 
          "pluralName": "Art Museums", 
          "shortName": "Art Museum" 
         }, 
         { 
          "categories": [], 
          "icon": { 
           "prefix": "https://ss3.4sqi.net/img/categories_v2/nightlife/stripclub_", 
           "suffix": ".png" 
          }, 
          "id": "559acbe0498e472f1a53fa23", 
          "name": "Erotic Museum", 
          "pluralName": "Erotic Museums", 
          "shortName": "Erotic Museum" 
         }, 
         { 
          "categories": [], 
          "icon": { 
           "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/museum_history_", 
           "suffix": ".png" 
          }, 
          "id": "4bf58dd8d48988d190941735", 
          "name": "History Museum", 
          "pluralName": "History Museums", 
          "shortName": "History Museum" 
         }, 
         { 
          "categories": [], 
          "icon": { 
           "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/museum_planetarium_", 
           "suffix": ".png" 
          }, 
          "id": "4bf58dd8d48988d192941735", 
          "name": "Planetarium", 
          "pluralName": "Planetariums", 
          "shortName": "Planetarium" 
         }, 
         { 
          "categories": [], 
          "icon": { 
           "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/museum_science_", 
           "suffix": ".png" 
          }, 
          "id": "4bf58dd8d48988d191941735", 
          "name": "Science Museum", 
          "pluralName": "Science Museums", 
          "shortName": "Science Museum" 
         } 
        ], 
        "icon": { 
         "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/museum_", 
         "suffix": ".png" 
        }, 
        "id": "4bf58dd8d48988d181941735", 
        "name": "Museum", 
        "pluralName": "Museums", 
        "shortName": "Museum" 
       }, 
      "icon": { 
       "prefix": "https://ss3.4sqi.net/img/categories_v2/arts_entertainment/default_", 
       "suffix": ".png" 
      }, 
      "id": "4d4b7104d754a06370d81259", 
      "name": "Arts & Entertainment", 
      "pluralName": "Arts & Entertainment", 
      "shortName": "Arts & Entertainment" 
     },

Mein Code die erste Hierarchie zieht, die immer ist nachfolgend aufgeführt es Subkategorien ist.

import urllib.request 
import json 
import sqlite3 
from key import ID, SECRET 

CLIENT_ID = ID 
CLIENT_SECRET = SECRET 
v = '20170315' 

url = 'https://api.foursquare.com/v2/venues/categories?client_id='+ CLIENT_ID +'&client_secret=' + SECRET + '&v=' + v 

contents = urllib.request.urlopen(url).read() 

parsed = json.loads(contents) 


clean = parsed['response']['categories'] 
my_list = [i['name'] for i in clean] 
print(my_list)

Ausgang:

['Arts & Entertainment', 'College & University', 'Event', 'Food', 'Nightlife Spot', 'Outdoors & Recreation', 'Professional & Other Places', 'Residence', 'Shop & Service', 'Travel & Transport']

Ich habe Schwierigkeiten beim Parsen der Untergruppen zu erhalten. Ich versuche, id und name für alle Kategorien, sub oder nicht zu ziehen.

Quelle

2017-03-20 Bernardo

Antwort

1

Wenn eine Datenstruktur rekursiv verschachtelt ist, ist eine rekursive Funktion oft der einfachste Weg, es zu analysieren:

def get_categories(data): 
    result = {} 
    for cat in data: 
     result[cat['id']] = cat['name'] 
     if cat['categories']: 
      result.update(get_categories(cat['categories'])) 
    return result

Dies gibt ein Wörterbuch von id: name Schlüssel/Wert-Paare, sich selbst rekursiv aufrufen und Aktualisierung result mit irgend Unterkategorien, die es auf dem Weg findet.

Die Überprüfung if ist nicht unbedingt erforderlich, da das Aufrufen der Funktion mit einer leeren Liste einfach ein leeres Wörterbuch zurückgeben würde, aber es spart viele sinnlose rekursive Aufrufe und sollte daher die Leistung verbessern.

Hier ist, wie Sie es verwenden würde:

categories = get_categories(parsed['response']['categories'])

... und hier ist das Ergebnis:

>>> from pprint import pprint 
>>> pprint(categories) 
{'4bf58dd8d48988d100941735': 'Meeting Room', 
'4bf58dd8d48988d100951735': 'Pet Store', 
'4bf58dd8d48988d101941735': 'Martial Arts Dojo', 
    # ... 
'57558b36e4b065ecebd306da': 'Savoyard Restaurant', 
'57558b36e4b065ecebd306dd': 'Truck Stop', 
'589ddde98ae3635c072819ee': 'Duty-free Shop'}

Quelle

2017-03-20 23:29:11

+1

Thank you! Arbeitete wie ein Charme und ich werde mehr über rekursive Funktionen nachschlagen. – Bernardo

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