Weather Forecast Application

Get API Key

1. Sign up at OpenWeatherMap and create an API key.
2. Note the API key, as you will need it to make requests.

Step 2: Install Required Packages

You’ll need the requests library to make API calls. You can install it using pip:

bashCopy codepip install requests

Step 3: Create the Weather Application

Create a file named weather_forecast.py and add the following code:

pythonCopy codeimport requests

class WeatherForecast:
    def __init__(self, api_key):
        self.api_key = api_key
        self.base_url = "http://api.openweathermap.org/data/2.5/weather"

    def get_weather(self, city):
        """Fetch the weather data for the given city."""
        try:
            params = {
                'q': city,
                'appid': self.api_key,
                'units': 'metric'  # Change to 'imperial' for Fahrenheit
            }
            response = requests.get(self.base_url, params=params)
            response.raise_for_status()  # Raise an error for bad responses
            return response.json()
        except requests.exceptions.HTTPError as e:
            print(f"HTTP error: {e}")
            return None
        except Exception as e:
            print(f"Error fetching weather data: {e}")
            return None

    def display_weather(self, city):
        """Display the weather information."""
        weather_data = self.get_weather(city)
        if weather_data:
            city_name = weather_data['name']
            temperature = weather_data['main']['temp']
            description = weather_data['weather'][0]['description']
            humidity = weather_data['main']['humidity']
            wind_speed = weather_data['wind']['speed']

            print(f"\nWeather in {city_name}:")
            print(f"Temperature: {temperature}°C")
            print(f"Description: {description.capitalize()}")
            print(f"Humidity: {humidity}%")
            print(f"Wind Speed: {wind_speed} m/s")
        else:
            print("Could not retrieve weather data.")

def main():
    api_key = input("Enter your OpenWeatherMap API key: ")
    weather_app = WeatherForecast(api_key)

    while True:
        city = input("\nEnter city name (or 'quit' to exit): ")
        if city.lower() == 'quit':
            print("Exiting the application.")
            break
        weather_app.display_weather(city)

if __name__ == "__main__":
    main()

Step 4: Running the Weather Application

1. Open your terminal (or command prompt).
2. Navigate to the directory where you saved weather_forecast.py.
3. Run the script using the command:bashCopy codepython weather_forecast.py

How It Works

• API Integration: The application fetches weather data from OpenWeatherMap using an API call based on the city name provided by the user.
• Data Display: It displays the temperature, weather description, humidity, and wind speed.
• User Input: The user can enter a city name to get the weather or type quit to exit.