Update app.py for Render

Author: hellenicdev

currency-converter/app.py

@@ -4,20 +4,16 @@
 import os
 from dotenv import load_dotenv
 
-# Load environment variables from .env
 load_dotenv()
 
 app = Flask(__name__)
 
-# Get API key from .env
 API_KEY = os.getenv("API_KEY")
-
 if not API_KEY:
-    raise ValueError("API key not found. Make sure API_KEY is set in .env")
+    raise ValueError("API key not found")
 
 API_URL = f"https://v6.exchangerate-api.com/v6/{API_KEY}/pair"
 
-# Get all ISO 4217 currencies (sorted)
 CURRENCIES = sorted([
     (c.alpha_3, c.name) for c in pycountry.currencies
     if hasattr(c, 'alpha_3') and hasattr(c, 'name')
@@ -34,21 +30,16 @@ def convert():
         from_currency = request.form['from_currency']
         to_currency = request.form['to_currency']
 
-        url = f"{API_URL}/{from_currency}/{to_currency}"
-        response = requests.get(url)
+        response = requests.get(f"{API_URL}/{from_currency}/{to_currency}")
         data = response.json()
 
         if data.get('result') == 'success':
-            rate = data['conversion_rate']
-            converted = round(amount * rate, 2)
+            converted = round(amount * data['conversion_rate'], 2)
             result = f"{amount} {from_currency} = {converted} {to_currency}"
         else:
-            result = "Conversion failed. Please check your currencies or API key."
+            result = "Conversion failed."
 
     except Exception as e:
-        result = f"Error: {str(e)}"
+        result = f"Error: {e}"
 
     return render_template('index.html', currencies=CURRENCIES, result=result)
-
-if __name__ == '__main__':
-    app.run(debug=True)