Run simulate in python

Several times I tried to use the lib to run transaction simulations, but it seems to have been difficult and unsuccessful work. This is how I am importing and using the lib:

```
from flashbots import flashbot

signer: LocalAccount = Account.from_key(private_key)
flashbot_con = flashbot(w3, account.address)

print(flashbot_con)
```

The output of this print returns None, and that prevents me from moving forward with the implementation. Does anyone have an idea what it could be?