Scenario

A cryptocurrency price API provides real-time market data in JSON format. You need to fetch the data and save it locally for later analysis.

Task

Write a Python script at /home/interview/fetch_crypto.py that sends a GET request to http://api.crypto.local/prices, retrieves the JSON response, and saves the complete response to /home/interview/crypto_data.json.

Step 1: Test the API endpoint

curl http://api.crypto.local/prices

Review the JSON structure to understand the response format.

Step 2: Create the Python script

nano /home/interview/fetch_crypto.py

Write a script that fetches the API data and saves it:

import requests
import json

# Fetch cryptocurrency data from API
response = requests.get('http://api.crypto.local/prices')
data = response.json()

# Save complete response to file
with open('/home/interview/crypto_data.json', 'w') as f:
    json.dump(data, f, indent=2)

print(f"Fetched data for {data['total_cryptocurrencies']} cryptocurrencies")

Step 3: Run the script

python3 /home/interview/fetch_crypto.py

Step 4: Verify the output

cat /home/interview/crypto_data.json

Should show the complete JSON response with metadata and cryptocurrency data.