Trying to create an action that will block all responses if not mentioned in given file.

[tamannaverma02]

Hi everyone!
I am trying to create a action that will block all the responses generated by bot if response is not related to topic specified in given file. But that is not happening.
Here is the code:
`
from nemoguardrails.actions import action
from typing import Any, List, Optional
import os

@action()
async def block_if_not_in_file(
file_name: Optional[str] = None,
context: Optional[dict] = None
):
# Get the bot's response from the context
bot_response = context.get("last_bot_message", "")

# Read the content of the specified file and store it as a string
file_content = ""
with open(file_name, "r") as f:
    file_content = f.read()

# Check if the bot's response is found in the file content
if bot_response in file_content:
    return False  # Allow the response if found in the file
else:
    return True   # Block the response if not found in the file

colang file:colang_content = """
define flow check bot response
bot ...
$is_blocked = execute block_if_not_in_file(file_name="filename.pdf")

if $is_blocked
bot remove last message
bot inform cannot answer question
"""`