I have created my own json data with an array I would like to parse into a python list. However, I've been having trouble doing so.
How can I extract my json array into a python list?
json data:
[
{
"ip": "192.168.241.109",
"cameras":
{
"front": "nf091",
"inside": "nf067",
"right": "004317",
"rear": "000189",
"left": "nf084"
}
},
{
"ip": "192.168.241.110",
"cameras":
{
"front": "nf091",
"inside": "nf067",
"right": "004317",
"rear": "000189",
"left": "nf084"
}
}
]
My json data is valid, so I don't know why I'm having trouble with the below code:
system_json = open(json_file)
json_obj = json.load(system_json)
camera_details = [[i['front'], i['rear'], i['left'], i['right'], i['inside']] for i in json_obj['cameras']]
The above code snippet does not work as it yields the list indices must be integers, not str error.
What am I doing wrong, and how can I properly parse my json array into a python list?
The issue is that your JSON "object" is a list, but then you try to index into it with a string (json_obj['cameras']).
What you have is a JSON array, each element of which is a dictionary containing (among other things) a key called "cameras". I believe this code does what you want:
import json
text = """[{"ip": "192.168.241.109", "cameras": {"front": "nf091", "inside": "nf067", "right": "004317", "rear": "000189", "left": "nf084"}}, {"ip": "192.168.241.110", "cameras": {"front": "nf091", "inside": "nf067", "right": "004317", "rear": "000189", "left": "nf084"}}]"""
json_array = json.loads(text)
camera_details = [[i['cameras']['front'], i['cameras']['rear'], i['cameras']['left'], i['cameras']['right'], i['cameras']['inside']] for i in json_array]
print(camera_details)
# Output:
# [['nf091', '000189', 'nf084', '004317', 'nf067'], ['nf091', '000189', 'nf084', '004317', 'nf067']]
EDIT
Possibly clearer/easier?
camera_details = [
[
cameras["front"],
cameras["rear"],
cameras["left"],
cameras["right"],
cameras["inside"],
]
for cameras in [item["cameras"] for item in json_array]
]
Related
I'm trying to parse a JSON response from an API and store the data to DATA CLASS and sending the data to recycler adapter as ArrayList.
The JSON Array has another array of objects inside, and I'm not able to find a way to properly parse that JSON response.
Here is my data class:
data class OrderDetails (
val orderId: String, // order_id value from json object goes here //
val restaurantName: String, // restaurant_name value from json object goes here //
val totalCost: String, // total_cost value from json object goes here //
val orderDate: String, // order_placed_at value from json object goes here //
val orderFoodDetails: String // food_items value in json response is an array and i'm stuck here //
)
Here is my Kotlin code:
try {
val data = it.getJSONObject("data")
val success = data.getBoolean("success")
if (success) {
val arrayData = data.getJSONArray("data")
for (i in 0 until arrayData.length()) {
val orderJsonObject = arrayData.getJSONObject(i)
val orderObject = OrderDetails(
orderJsonObject.getString("order_id"),
orderJsonObject.getString("restaurant_name"),
orderJsonObject.getString("total_cost"),
orderJsonObject.getString("order_placed_at"),
orderJsonObject.getJSONArray("food_items").toString() // getting array and storing as a string
)
orderList.add(orderObject)
for (orders in orderList) {
val foodData = orders.orderFoodDetails
val jsonFood = JSONArray(foodData)
for (j in 0 until jsonFood.length()) {
val foodJsonObject = jsonFood.getJSONObject(j)
val foodObject = OrderFoodDetails(
foodJsonObject.getString("food_item_id"),
foodJsonObject.getString("name"),
foodJsonObject.getString("cost")
)
ordersFood.add(foodObject)
}
}
}
Here is the Json response:
{
"data": {
"success": true,
"data": [
{
"order_id": "17790",
"restaurant_name": "Rotten Tomatoes",
"total_cost": "280",
"order_placed_at": "02-11-20 19:00:54",
"food_items": [
{
"food_item_id": "156",
"name": "Rotten Bhajiya",
"cost": "100"
},
{
"food_item_id": "155",
"name": "Rotten Salad",
"cost": "100"
},
{
"food_item_id": "154",
"name": "Rotten Soup",
"cost": "80"
}
]
},
Required Output
Prefered Output
My output
my current output
do you tried to use GSON or Moshy lib ?
This case will be easier solved with one of this :)
If you don't want to use one of them, just try to replace your for cycle to map or for each, to make it more readable. Looks like you make it right, but can you check the result of try catch block please?
Good healty everyone, I want to ask something about managing data from JSON. I've JSON format like below :
{
"msg": "Success"
"data": [
{
"id": "1",
"notelp": "0000000000",
"user": "no1"
},
{
"id": "2",
"notelp": "1111111111",
"user": "no2"
},
],}
and I want to get value from variable "notelp", I expect output like this {"0000000000", "1111111111",} how to get it ?
I tried this before, but still can't get what I want,
if (response.statusCode == 200) {
final result = json.decode(response.body);
debugPrint('dataTelp: ${result['data']['notelp']}');
}
thank you guys to help me to solve it and stay save.
You can use the forEach or another looping method to get data from a list.
List outPut = [];
List data = response['data'];
data.forEach((element) {
outPut.add(element['notelp']);
});
print(outPut);
i have the following Array Object :
[
{
"key1": abc,
"key2":xyz
},
{
"key1": abc,
"key2":xyz
}
]
Now what i want is to print "key1" & "key2". I know we can iterate through values using map, but i also want to iterate through Array keys.
Assuming ArrayObj contains the key:value pairs, we can do the following:
let keys = Object.keys(ArrayObj);
for(index=0;index<keys.length;index++)
{
console.log(keys[index]);
}
Im trying to compare two specific bits of information. One is in the form of a as3 string the other is in the form of a Json array.
The Json array shows customer data from a shop website. What i want to do is have as3 compare the string(i.e a customer name) with the data , and when it has found the matching name, only trace that customers specific information.
Im amusing id have to use a loop for the comparison , but im having trouble getting my head around how to convert the Json into specific junks that can then be compared individually with a string. Any help would be perfect.
Thanks
Be aware that JSON is just a standard AS3 object. There's no magic going on here; loop through it as you would any other structure and run your comparisons as usual.
Solution
var jsonObj:Object = {
"customers": [
{
"id": "04aa1ab3-521b-11e3-a29a-bc305bf5da20",
"name": "fake name",
"customer_code": "00000002",
"customer_group_id": "6012cd22-5166-11e3-a29a-bc305bf5da20",
"customer_group_name": "All Customers",
"first_name": "test",
"last_name": "test",
"company_name": "",
"email": "testest#yahoo.com"
}
]
}
var myString:String = "fake name";
for (var k:String in jsonObj.customers[0]) {
var v:String = jsonObj.customers[0][k];
if (v == myString) {
trace(myString + "'s email is " + jsonObj.customers[0].email)
}
}
Use a Dictionary Object to store customer objects using their unique names (or ids ) as reference;
You certainly do not want to write unnecessary loop search for a customer in question.
Solution.
var jsonObj:Object = {
"customers": [
{
"id": "04aa1ab3-521b-11e3-a29a-bc305bf5da20",
"name": "fake name",
"customer_code": "00000002",
"customer_group_id": "6012cd22-5166-11e3-a29a-bc305bf5da20",
"customer_group_name": "All Customers",
"first_name": "test",
"last_name": "test",
"company_name": "",
"email": "testest#yahoo.com"
}
]
}
//Dictionary Object to store customers
var customers:Dictionary=new Dictionary();
//customer object in the json
var customer:Object;
//loop json object to retrieve customers and
//store them in Dictionary using either unique name or id
for each(customer in jsonObj)
customers[customer.name]=customer;
//retrieve customer in question
function getCustomer(id:String):Object
{
return customers[id] as Object;
}
What is the root property value if I get a Json like that:
{
"status": {
"status": 0,
"msg": "Ok",
"protocolversion": "extjs.json"
},
"value": {
"table": [
[
"admin",
"Administrator",
""
],
[
"test",
"Test",
""
]
],
"total": 2
}
}
The data will be displayed in a gridpanel, 1 row is admin, 1 row is test, etc.
Tried:
value, value.table
How to get this to work?
value.table is correct for the root property, but you are using a json format that I don't think Ext is set up to handle by default. It has a reader for json that is used for an array of objects, not for an nested arrays of field values with no object mapping information.
If you have to use that format, you will either need to create your own readers/writers or just use Ext.Ajax.request(), and in the callback, parse the nested array into objects. Something like:
Ext.Ajax.request({
url: 'path.com/to/content',
success: function (response, operation) {
var data = Ext.JSON.decode(response.responseText);
var fields = data.value.table;
var records = [];
Ext.Array.each(fields, function (fieldArray, fieldIndex) {
Ext.Array.each(fieldArray, function(fieldValue, valueIndex) {
//Create record object if it doesn't exist
var record = records[valueIndex] || {};
//Create a switch statement based on the array index to set fields
switch(fieldIndex) {
case 0:
record.User_id = fieldValue;
break;
case 1:
record.Username = fieldValue;
break;
}
});
});
//Add the objects to the empty store
store.add(records);
}
});
That's not a production solution by any means since it doesn't handle that empty string at the end of your list or the case that you get a jagged array of arrays per field which I can't imagine what to do with. If it's within your control or influence, I would suggest using a format more like what Ext suggests so you can use the built in json proxy/reader/writer or go crazy with it and implement ext's remote procedure call format:
{
"success": true,
"message": "Success",
"data": [
{
"User_id": "admin",
"Username": "Administrator"
}, {
"User_id": "admin",
"Username": "Administrator"
}
]
}
In above example "value" is root property. But for JSON reader it's a property name (or a dot-separated list of property names if the root is nested).
so you can assign into your field you need following.
fields:['table.admin','table.test']