Update app.py

app.py

@@ -10,26 +10,28 @@ def get_available_cryptos():
         response = requests.get(url)
         response.raise_for_status()
         data = response.json()
-        # Create a dictionary to map symbols to IDs
-        cryptos = {coin["symbol"].lower(): coin["symbol"].upper() for coin in data}
+        # Create a dictionary to map lowercase IDs to their uppercase symbols
+        cryptos = {coin["id"]: coin["symbol"].upper() for coin in data}
         return cryptos
     except requests.exceptions.RequestException as e:
         st.error(f"Error fetching cryptocurrency list: {e}")
         return {}
 
-# Function to get current price of the selected cryptocurrency in USD
+# Function to get the current price of the selected cryptocurrency in USD
 def get_crypto_price(crypto_id):
     url = f"https://api.coingecko.com/api/v3/simple/price?ids={crypto_id}&vs_currencies=usd"
     try:
         response = requests.get(url)
         response.raise_for_status()
-        return response.json()[crypto_id]['usd']
+        price_data = response.json()
+        if crypto_id in price_data:
+            return price_data[crypto_id]['usd']
+        else:
+            st.error(f"Invalid cryptocurrency ID: {crypto_id}")
+            return None
     except requests.exceptions.RequestException as e:
         st.error(f"Error fetching data: {e}")
         return None
-    except KeyError:
-        st.error(f"Invalid cryptocurrency symbol: {crypto_id}")
-        return None
 
 # Streamlit app layout
 st.title("Crypto to USD Converter")