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3002 :: Nim Accessing Nested JSON Data

• alfrednewman (orginal) [2017-06-15T02:55:41+02:00] view original

  Hallo,

  Im trying to handle a nested JSON Data without success.

  Given http://api.zippopotam.us/us/ma/belmont/ the output is the following:

  {
    "country abbreviation": "US",
    "places": [
      {
        "place name": "Belmont",
        "longitude": "-71.4594",
        "post code": "02178",
        "latitude": "42.4464"
      },
      {
        "place name": "Belmont",
        "longitude": "-71.2044",
        "post code": "02478",
        "latitude": "42.4128"
      }
    ],
    "country": "United States",
    "place name": "Belmont",
    "state": "Massachusetts",
    "state abbreviation": "MA"
  }
  Run

  In Python (w/ requests), I can do something like:

  import requests
  r = requests.get('http://api.zippopotam.us/us/ma/belmont')
  j = r.json()
  
  print(j['state'])
  print(len(j['places']))
  for each in j['places']:
     print(each['latitude'])
  Run

  And I have the result:

  Massachusetts
  2
  42.4464
  42.4128
  Run

  Pls how can I do that in Nim ?

  Cheers

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• niofis (orginal) [2017-06-15T03:21:59+02:00] view original

  You can use the httpclient and json modules, and the rest of the code is almost identical:

  import httpclient, json
  
  var client = newHttpClient()
  var res = client.getContent("http://api.zippopotam.us/us/ma/belmont")
  var j = parseJson(res)
  echo j["state"]
  echo j["places"].len
  for each in j["places"]:
    echo each["latitude"]
  Run

  Regards

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• mashingan (orginal) [2017-06-15T03:46:19+02:00] view original

  Look for json and httpclient module

  import json, httpclient
  
  var
    url = "http://api.zippopotam.us/us/ma/belmont"
    client = newHttpClient()
    content = client.getContent(url).parseJson
    state = content["state"]
    places = content["places"]
  
  echo state.getStr
  echo places.len
  for place in places.items:
    echo place["latitude"].getStr
  Run

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