Add weather-app.py script to fetch current temperature using OpenWeatherMap API

weather-app.py

@@ -0,0 +1,69 @@
+import requests
+
+def get_temperature(city_name, api_key):
+    """
+    Fetches the current temperature in Fahrenheit for a given U.S. city
+    using the OpenWeatherMap API.
+
+    Parameters:
+        city_name (str): The name of the U.S. city.
+        api_key (str): Your OpenWeatherMap API key.
+
+    Returns:
+        float: Current temperature in Fahrenheit if successful.
+        None: If an error occurs or the data cannot be retrieved.
+    """
+    if not api_key or not isinstance(api_key, str):
+        print("Error: Invalid or missing API key.")
+        return None
+
+    base_url = "https://api.openweathermap.org/data/2.5/weather"
+    params = {
+        'q': f"{city_name},US",
+        'appid': api_key,
+        'units': 'imperial'
+    }
+
+    try:
+        response = requests.get(base_url, params=params, timeout=10)
+        response.raise_for_status()
+        data = response.json()
+
+        if 'main' in data and 'temp' in data['main']:
+            return data['main']['temp']
+        else:
+            print("Error: Unexpected response structure.")
+            return None
+    except requests.exceptions.HTTPError as http_err:
+        print(f"HTTP error occurred: {http_err}")
+    except requests.exceptions.ConnectionError:
+        print("Error: Network connection error.")
+    except requests.exceptions.Timeout:
+        print("Error: The request timed out.")
+    except requests.exceptions.RequestException as err:
+        print(f"Error: An unexpected error occurred: {err}")
+    except ValueError:
+        print("Error: Failed to parse JSON response.")
+
+    return None
+
+def main():
+    import os
+    api_key = os.getenv('OPENWEATHER_API_KEY')
+    if not api_key:
+        print("Error: Please set the OPENWEATHER_API_KEY environment variable")
+        return
+
+    city = input("Enter a major U.S. city: ").strip()
+    if not city:
+        print("Error: City name cannot be empty")
+        return
+
+    temp = get_temperature(city, api_key)
+    if temp is not None:
+        print(f"The current temperature in {city.title()} is {temp:.1f}°F.")
+    else:
+        print("Sorry, couldn't find weather data for that city.")
+
+if __name__ == "__main__":
+    main()