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Fetching JSON

So far, our JSON has been sitting there waiting for us. But in many cases, you'll need to go fetch it from an API first. If an API serves you JSON over HTTP, that means you'll:

Make a request
Read the response body
Parse the JSON

Python's built-in urllib.request module can make simple HTTP requests.

import urllib.request

url = "https://api.example.com/stocks"

with urllib.request.urlopen(url) as response:
    raw_data = response.read()
    data = json.loads(raw_data)

urlopen() sends the request
read() gets the response body
json.loads() parses the JSON

Assignment

Complete the fetch_device_status function. It accepts a device_id string and fetches its status (a dictionary) from the SnackStack API.

Build the test-only URL string using the given device ID:

f"https://api.snackstack.dev/devices/{device_id}/status"

Use urllib.request.urlopen() to send the request.
Read the response body with .read().
Parse the response body with json.loads().
Return the parsed dictionary.
Catch urllib.error.URLError for request failures or json.JSONDecodeError for invalid JSON, and return None in either case.