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how to get a value from a json text Python

import requests
import json
r = requests.get("https://api.investing.com/api/search/?t=Equities&q=amd") # i get json text from this api
data = json.loads(r.text)
if data['articles'][0]['exchange'] == 'Sydney': # the error is here KeyError: 'exchange'
print('success')
else:
print('fail')
if i want to get the url '/equities/segue-resources-ltd' by checking if the 'exchange' is 'Sydney' which is stored in this part of the json text, {"id":948190,"url":"/equities/segue-resources-ltd","description":"Segue Resources Ltd","symbol":"AMD","exchange":"Sydney","flag":"AU","type":"Equities"}

If i'm understanding this correctly, the exchange identifier only appears in part of the json response. So, in order to get your result using the same data variable in your question, we can do this:
result = [val["url"] for val in data["quotes"] if val["exchange"] == "Sydney"]
We are using a list comprehension here, where the loop is only going through data["quotes"] instead of the whole json response, and for each item in that json subset, we're returning the value for key == "url" where the exchange == "Sydney". Running the line above should get you:
['/equities/segue-resources-ltd']
As expected. If you aren't comfortable with list comprehensions, the more conventional loop-version of it looks like:
result = []
for val in data["quotes"]:
if val["exchange"] == "Sydney":
result.append(val["url"])
print(result)

KeyError: 'exchange' means that the dictionary data['articles'][0] did not have a key 'exchange'.
Depending on your use case, you may want to iterate over the whole list of articles:
for article in data['articles']:
if 'exchange' in article and article['exchange'] == 'Sydney':
... # Your code here
If you only want to check the first article, then use data['articles'][0].get('exchange'). The dict.get() method will return None if the key is not present instead of throwing a KeyError.

Append multiple json request as list

I can't seems to wrap my head around this silly issue. There are API requests that run simultaneously 23 different section stored in a dictionary :
polygonsDict = {
'Sect1':'100,6.3',
'Sect2':'100,6.0',
'Sect3':'100,5.5' # and more sections
}
urlDict = {
'traffic': 'https://google.com'
}
Here is the code where I iteratively :
section_key = list(polygonsDict.keys()) #convert the dictionary key to list for iteration
for idx, section in enumerate(section_key):
traffics(section ,urlDict['traffic']+polygonsDict[section]).getPolygonTraffics() #This line is constructing the link for request.
Then, the link is send to a class called traffics with getPolygonTraffics function :
class traffics:
def __init__(self, name, traffics):
self.traffics = traffics
self.name = name
def getPolygonTraffics(self):
try :
print("TRF: Running for "+self.name+"...")
raw = req.get(self.traffics).json()
traffics_raw = [raw] #wrap the dict to list
traffics_ls = []
for ls in traffics_raw:
traffics_ls.append(ls)
#Melt the list of dictionary to form a DataFrame
traffics_df = pd.DataFrame(traffics_ls).explode('jams').reset_index(drop=True)
print(traffics_df)
#exception when `jams` is not found in the list of dict.
except KeyError:
print("Skip!")
In getPolygonTraffics, I want to append every traffics_raw (the json requests) to one individual list and eventually, explode them to a dataFrame. How can I achieve this? I'm not very sure how to explain this.
Current output is multiple lists of each dictionary :
[{}]
[{}]
WHat I want is : [{},{},{}]. Then explode to DataFrame.

Loop List Python for Variable

Im trying to loop through a list and insert the 'extensionid' into the URL
extensionid = ['1234','12356']
url = '/restapi/v1.0/account/~/extension/'+extensionid+'/presence'
params = {
'dndStatus': "TakeAllCalls",
}
resp = platform.get(url, params,)
print ((resp.text()))
But I get the error
url = '/restapi/v1.0/account/~/extension/'+extensionid+'/presence'
TypeError: can only concatenate str (not "list") to str [Finished in
1.121s
What am I doing wrong?
Thanks!

You probably need.
extensionid = ['1234','12356']
url = '/restapi/v1.0/account/~/extension/{}/presence'
params = {
'dndStatus': "TakeAllCalls",
}
for id in extensionid: #iterate each id
resp = platform.get(url.format(id), params) #form URL and query.
print ((resp.text()))

extensionid is a list of strings.
So, you cannot concatenate a list with a string as error is telling you.
To access a specific item of the list you have to use an index.
For example:
extensionid[0] // it contains 1234
extensionid[1] // it contains 12356
So, your url can be written like this:
url = '/restapi/v1.0/account/~/extension/'+extensionid[0]+'/presence'
In this case it will be evaluated by python as:
url = '/restapi/v1.0/account/~/extension/1234/presence'
Please consider this simple documentation about lists:
https://www.programiz.com/python-programming/list
To iterate the elements of a list you can use:
for element in extensionid:
url='/restapi/v1.0/account/~/extension/'+ element +'/presence'
print(url)

Python 3. Extract data from json

How to extract 41677?
My json:
{"41677":{"key":"ilya","premium":"true"}}
My code:
params={"id": "ilya", "fmt": "json"}
r=requests.get("somesite", params=params )
data=json.loads(r.text)

By using loads, your JSON string will be converted to a dictionary which maps keys to values.
Since you need the key 41677, you can simply call data.keys()[0] to retrieve the first key of your dictionary.
EDIT:
Also, if you have a list of that JSON structure, you can iterate over the keys and values using the items function, like so:
for key, value in data.items():
print key # 41677
print value # {"key":"ilya","premium":"true"}

By using Requests' built-in json attribute:
data = requests.get("somesite", params=params ).json().keys()[0]
assuming the json it returns is {"41677":{"key":"ilya","premium":"true"}}:
>>>print data
"41677"

import json
s = {"41677":{"key":"ilya","premium":"true"}}
d = json.dumps(s)
l = json.loads(d)
l.keys()

How can I create the empty json object?

I have this code
json.loads(request.POST.get('mydata',dict()))
But I get this error
No JSON object could be decoded
I just want that if don't have mydata in POST, then I don't get that error.

Simply:
json.loads(request.POST.get('mydata', '{}'))
Or:
data = json.loads(request.POST['mydata']) if 'mydata' in request.POST else {}
Or:
if 'mydata' in request.POST:
data = json.loads(request.POST['mydata'])
else:
data = {} # or data = None

loads() takes a json formatted string and turns it into a Python object like dict or list. In your code, you're passing dict() as default value if mydata doesn't exist in request.POST, while it should be a string, like "{}". So you can write -
json_data = json.loads(request.POST.get('mydata', "{}"))
Also remember, the value of request.POST['mydata'] must be JSON formatted, or else you'll get the same error.