Update frontend.py

frontend.py

@@ -6,7 +6,11 @@ history = []
 
 def calculate(expression):
     try:
-        response = requests.post("/calculate", json={"expr": expression})
+        # Dynamically construct the API URL
+        base_url = gr.utils.get_space_url() or "http://localhost:7860"
+        api_url = f"{base_url}/calculate"
+        
+        response = requests.post(api_url, json={"expr": expression})
         if response.status_code == 200:
             result = response.json()["result"]
             result_str = f"{result:.8f}".rstrip('0').rstrip('.')
@@ -20,7 +24,6 @@ def calculate(expression):
             return expression, f"Error: {error_message}", "\n".join(reversed(history))
     except requests.RequestException as e:
         return expression, f"Network Error: {str(e)}", "\n".join(reversed(history))
-
 def update_expression(expression, value):
     if expression == "0" and value not in ['.', '(', ')']:
         return value