Weather Application

Build a command-line weather application that fetches current weather data for a city from a public weather API using the requests library and displays it in a readable format.

Requirements

1. Use the requests library to call a weather API (e.g., OpenWeatherMap) with an API key.
2. Ask the user to enter a city name.
3. Send a GET request with the city name and API key as parameters.
4. Parse the JSON response to extract temperature, weather description, and humidity.
5. Handle errors: invalid city name (404), network errors, and missing API key.
6. Display the results in a friendly formatted output.
7. Allow the user to check weather for multiple cities in a loop.
8. Convert temperature from Kelvin to Celsius if needed (depending on API units setting).

import requests

API_KEY = "YOUR_API_KEY"  # Get a free key from openweathermap.org
BASE_URL = "https://api.openweathermap.org/data/2.5/weather"

def get_weather(city):
    params = {
        "q": city,
        "appid": API_KEY,
        "units": "metric"  # Celsius
    }
    try:
        response = requests.get(BASE_URL, params=params, timeout=5)
        if response.status_code == 404:
            print(f"City '{city}' not found.")
            return None
        response.raise_for_status()
        return response.json()
    except requests.exceptions.RequestException as e:
        print(f"Network error: {e}")
        return None

def display_weather(data):
    if not data:
        return
    city = data["name"]
    country = data["sys"]["country"]
    temp = data["main"]["temp"]
    feels_like = data["main"]["feels_like"]
    humidity = data["main"]["humidity"]
    description = data["weather"][0]["description"].title()

    print(f"\nWeather in {city}, {country}")
    print(f"  Condition:   {description}")
    print(f"  Temperature: {temp}°C (feels like {feels_like}°C)")
    print(f"  Humidity:    {humidity}%")

def main():
    if API_KEY == "YOUR_API_KEY":
        print("Please set a valid API_KEY before running.")
        return

    while True:
        city = input("\nEnter a city name (or 'quit' to exit): ").strip()
        if city.lower() == "quit":
            print("Goodbye!")
            break
        if not city:
            print("Please enter a city name.")
            continue

        data = get_weather(city)
        display_weather(data)

if __name__ == "__main__":
    main()

50 XP on completion Back to Day 8

Your Code

import requests

API_KEY = "YOUR_API_KEY"  # Get a free key from openweathermap.org
BASE_URL = "https://api.openweathermap.org/data/2.5/weather"

def get_weather(city):
    # TODO: build params with city, API_KEY, and units=metric
    # TODO: send GET request, handle errors, return parsed data
    pass

def display_weather(data):
    # TODO: print city, temperature, description, humidity
    pass

# Example usage
# weather = get_weather("London")
# display_weather(weather)

Output

Click "Run" to execute your code...