Try fix custom tool error

app.py

@@ -9,14 +9,15 @@ from Gradio_UI import GradioUI
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return type
+def extract_char(arg1:str, arg2:int)-> str: #it's import to specify the return type
     #Keep this format for the description / args / args description but feel free to modify the tool
-    """A tool that extract the one character of the input string 
+    """A tool that extract the one character of the input string.
     Args:
         arg1: the input string
         arg2: position of the character to extract
     """
-    return arg1[arg2]
+    print("type(arg2)", type(arg2))
+    return arg1[int(arg2)]
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
@@ -56,7 +57,7 @@ with open("prompts.yaml", 'r') as stream:
 agent = CodeAgent(
     model=model,
     tools=[
-        my_custom_tool,
+        extract_char,
         get_current_time_in_timezone,
         DuckDuckGoSearchTool(),
         image_generation_tool,