Add docstr

app.py

@@ -1,6 +1,17 @@
 import gradio as gr
 
 def convert_temperature(temp, unit):
+    """
+    Convert a temperature value between Celsius, Fahrenheit, and Kelvin.
+
+    Args:
+        temp (str or float): The temperature value to convert.
+        unit (str): The unit of the input temperature ('Celsius', 'Fahrenheit', or 'Kelvin').
+
+    Returns:
+        tuple: A tuple containing three strings with the temperature in Celsius, Fahrenheit, and Kelvin,
+               formatted to two decimal places. If input is invalid, returns an error message.
+    """
     try:
         temp = float(temp)
         if unit == "Celsius":