How can you retrieve several data points from a JSON file through an API in Python when certain values may be empty or null?

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You can retrieve several data points from a JSON file through an API in Python using the following steps:

1. Use the requests library in Python to send an HTTP request to the API endpoint that returns JSON data.

2. Convert the JSON data into a Python object using the json module or other libraries like pandas.

3. Access the desired data points in the JSON object using their keys or indexes.

4. Check if any of the values are empty or null before using them in your code.

For example, if you have a JSON object that contains a list of dictionaries with some empty values:

{
    "data": [
        {"name": "John", "age": 25},
        {"name": "Jane", "age": null},
        {"name": "", "age": 30},
        {"name": "Bob", "age": ""}
    ]
}

You can retrieve the names and ages of each person in the list and handle the empty values like this:

import requests
import json

# send a GET request to the API endpoint that returns JSON data
response = requests.get("https://example.com/api/data")

# convert the JSON data into a Python object
data = json.loads(response.text)

# access the desired data points in the JSON object
for person in data['data']:
    name = person['name'] if person['name'] else '[Unknown]'
    age = person['age'] if person['age'] is not None else '[Unknown]'
    print(f"{name} is {age} years old.")

This code will print the following output:

John is 25 years old.
[Unknown] is [Unknown] years old.
[Unknown] is 30 years old.
Bob is [Unknown] years old.

Note that we use the ternary operator to check if the name or age values are empty or null and replace them with a default value if necessary.