I have the following JSON string (from wikipedia http://en.wikipedia.org/wiki/JSON)
{
"name":"Product",
"properties":
{
"id":
{
"type":"number",
"description":"Product identifier",
"required":true
},
"name":
{
"type":"string",
"description":"Name of the product",
"required":true
},
"price":
{
"type":"number",
"minimum":0,
"required":true
},
"tags":
{
"type":"array",
"items":
{
"type":"string"
}
},
"stock":
{
"type":"object",
"properties":
{
"warehouse":
{
"type":"number"
},
"retail":
{
"type":"number"
}
}
}
}
}
I am trying to decode this string using Python json library. I would like to access the node
properties - > stock - > properties - > warehouse.
I understand that json.loads() function stores the json string as a dictionary. But in this case properties is my key and everything under that are values. How do I access the above node.
import json
jsonText=""
file = open("c:/dir/jsondec.json")
for line in file.xreadlines():
jsonText+=line
data = json.loads(jsonText)
for k,v in data.items():
print k // shows name and properties
file.close();
Thanks
You can load json straight from the file like this:
f = open("c:/dir/jsondec.json")
data = json.load(f)
Based on your input string, data is now a dictionary that contains other dictionaries. You can just navigate up the dictionaries like so:
node = data['properties']['stock']['properties']['warehouse']
print str(node)
Related
I have a simple json in python that looks like :
{
"list": [{
"key1": "value1"
},
{
"key1": "value1"
}
]
}
I want to transform this to the following json. Any suggestions how I can do it with python without installing additional libraries?
{
"list": [{
"keys": {
"name": "key1",
"value": "value1"
}
}, {
"keys": {
"name": "key1",
"value": "value1"
}
}]
}
Not sure from your question if you already have the json read into a variable, or if it is in a file. This is assuming you have it in a variable already:
in_json = {
"list": [{
"key1": "value1"
},
{
"key2": "value2"
}
]
}
out_json = {"list":[]}
for kd in in_json["list"]:
sub_kd = {"keys": {}}
for k,v in kd.iteritems():
sub_kd["keys"]["name"] = k
sub_kd["keys"]["value"] = v
out_json["list"].append(sub_kd)
print(out_json)
It just loops through the json making dictionaries to append to the out_json dictionary. You could make this print pretty with the json library and also save to file with it
You didn't indicate exactly what contains the JSON data is in, so I've put it all in a string in the example code below and uses the json.loads() function to turn it into a Python dictionary. If it's in a file, you can use the module's json.load() function instead.
It also make the assume that each sub-JSON object in the "list" list consists of only one key/value pair as shown in your question.
The code below changes the deserialized dictionary in-place and pretty-prints the result of doing that by using the json.dumps() function to reserialize it.
Note that I changed the keys and values in sample input JSON slightly to make it easier to see the correspondence between it and the printed results.
import json
json_in = '''
{
"list": [
{
"key1": "value1"
},
{
"key2": "value2"
}
]
}
'''
json_data = json.loads(json_in) # Deserialize.
for i, obj in enumerate(json_data['list']):
# Assumes each object in list contains only one key, value pair.
newobj = { 'name': next(iter(obj.keys())),
'value': next(iter(obj.values()))}
json_data['list'][i] = {'keys': newobj}
print(json.dumps(json_data, indent=4)) # Reserialize and print.
Printed result:
{
"list": [
{
"keys": {
"name": "key1",
"value": "value1"
}
},
{
"keys": {
"name": "key2",
"value": "value2"
}
}
]
}
I am trying to parse a JSON file which is containing multiple JSON objects. Here is my code:
{
"obj1": {
"type": "object",
"permission": "r",
"obj2": {
"type": "param",
"permission": "r/w"
},
"obj3": {
"type": "param",
"permission": "r"
},
"obj4": {
"type": "object",
"permission": "r",
"obj5": {
"type": "param",
"permission": "r/w"
},
"obj6": {
"type": "param",
"permission": "r"
},
"obj7": {
"type": "object",
"permission": "r",
"obj8": {
"type": "param",
"permission": "r/w"
},
"obj9": {
"type": "param",
"permission": "r"
}
}
}
}
}
I had tried single object parsing response in JSON, that I able to fetch. But I don't not know how to parse the JSON object with Multiple nodes.
For each JSON obejct , I don't also know its name (obj1, obj2, ..)
I want in output as result:
obj1: has 2 param and 1 object
obj2: has 2 param and 1 object
obj3: has 2 param
Is there any way with python to parse JSON file with multiple objects?
try this:
op = json.loads(json_string)
for i,(key,value) in enumerate(op.items()):
objects = 0
params = len(value)
if isinstance(value,dict):
for k,v in value.items():
if isinstance(v,dict):
objects +=1
print("Object {i} has {params} params and {objects} objects".format(i=i+1,params=params-objects,objects=obj
I have the following dictionary in python which I'm saving into a file:
d2 = {
"CHARACTER": {
"IDENTITY": {
"FORM": {
"id": "BK1",
"type": "MAGE",
"role": "DARK"
}
},
"USER": {
"owner": {
"id": "SABBATH13"
},
"level": "16"
}
}
}
jsonfile = open('d2.json', 'w')
jsonfile.write(simplejson.dumps(d2, indent=4))
jsonfile.close()
However, I'm told this is a JSON object, which I need to turn into a JSON array of the form:
[{
"CHARACTER": {
"IDENTITY": {
"FORM": {
"id": "BK1",
"type": "MAGE",
"role": "DARK"
}
},
"USER": {
"owner": {
"id": "SABBATH13"
},
"level": "16"
}
}
}]
Which is essentially adding square brackets at the beginning and end.
What is the proper way to do this? Should I convert to string and add brackets, then convert back? Sorry, total JSON newbie here.
You're thinking at the wrong level of abstraction. It's not about the brackets, it's about that you have a data structure which is an object, when what you apparently need is a list/array of objects (even if there's just one object in the list). So:
d2 = [d2]
Now dumps this and you get what you need.
I need to make a get (id, name, fraction id) for each deputy in this json
{
"id": "75785",
"title": "(за основу)",
"asozdUrl": null,
"datetime": "2011-12-21T12:20:26+0400",
"votes": [
{
"deputy": {
"id": "99111772",
"name": "Абалаков Александр Николаевич",
"faction": {
"id": "72100004",
"title": "КПРФ"
}
},
"result": "accept"
},
{
"deputy": {
"id": "99100491",
"name": "Абдулатипов Рамазан Гаджимурадович",
"faction": {
"id": "72100024",
"title": "ЕР"
}
},
"result": "none"
}
.......,` etc
My code is looks like that:
urlData = "https://raw.githubusercontent.com/data-dumaGovRu/vote/master/poll/2011-12-21/75785.json"
response = urllib.request.urlopen(urlData)
content = response.read()
data = json.loads(content.decode("utf8"))
for i in data:
#print(data["name"])
`
And i dont know what to do with that #print line, how I should write it?
You can access the list containing the deputies with data['votes']. Iterating through the list, you can access the keys you're interested in as you would with dict key lookups. Nested dicts imply you have to walk through the keys starting from the root to your point of interest:
for d in data['votes']:
print(d['deputy']['id'], d['deputy']['name'], d['deputy']['faction']['id'])
I would like to make the following JSON syntax output with python:
data={
"timestamp": "1462868427",
"sites": [
{
"name": "SiteA",
"zone": 1
},
{
"name": "SiteB",
"zone": 7
}
]
}
But I cannot manage to get the 'outer' data key there.
So far I got this output without the data key:
{
"timestamp": "1462868427",
"sites": [
{
"name": "SiteA",
"zone": 1
},
{
"name": "SiteB",
"zone": 7
}
]
}
I have tried with this python code:
sites = [
{
"name":"nameA",
"zone":123
},
{
"name":"nameB",
"zone":324
}
]
data = {
"timestamp": 123456567,
"sites": sites
}
print(json.dumps(data, indent = 4))
But how do I manage to get the outer 'data' key there?
Once you have your data ready, you can simply do this :
data = {'data': data}
JSON doesn't have =, it's all key:value.
What you're looking for is
data = {
"data": {
"timestamp": 123456567,
"sites": sites
}
}
json.dumps(data)
json.dumps() doesn't care for the name you give to the data object in python. You have to specify it manually inside the object, as a string.