Update app.py

app.py

@@ -16,7 +16,7 @@ with col2:
 with col3:
     st.write('### Constants')
     constants = st_ace(placeholder="Optional list of scalar constants", value="[]", language="python", theme="solarized_dark")
-if any(inputs, output, constants):
+if any([inputs, output, constants]):
     i = eval(inputs)
     o = eval(output)
     c = eval(constants)