A simple twitter bot using Twitter API v2

bot.py

import pytwitter
from os import environ as env
from dotenv import load_dotenv

load_dotenv() # Loads the .env file we created earlier

api = pytwitter.Api(
    consumer_key=env["CONSUMER_KEY"],
    consumer_secret=env["CONSUMER_SECRET"],
    access_token=env["OAUTH_TOKEN"],
    access_secret=env["OAUTH_TOKEN_SECRET"],
)

# print(api.get_user(username="Twitter")) # To test the api connection

last_tweet_id = 0 # Just a variable to keep track of the last tweet we replied to.

if __name__ == "__main__":

    while True:
        mentions = api.get_mentions(
            user_id=str(BOT_ID), # get bot id from tweeterid.com
            return_json=True,
            since_id=str(last_tweet_id),
            tweet_fields=[
                "conversation_id",
                "entities",
                "in_reply_to_user_id",
                "referenced_tweets"
            ]
        )


        if not isinstance(mentions, dict):
            continue

        if not "data" in mentions.keys():
            continue # There's no more tweets

        for tweet in mentions["data"]:
            text = tweet["text"]
            reply_to = tweet["id"]

            # If it's not a reply to another tweet
            if not (tweet["conversation_id"] == tweet["id"]):
                if str(tweet["in_reply_to_user_id"]) == str(BOT_ID):
                    continue

                # Get the parent tweet
                tweet_ = api.get_tweet(return_json=True,tweet_id=tweet["referenced_tweets"][0]["id"])
                text = tweet_["text"]


            # If tweet is a reply, it's in the format "@user @user @bot"
            users = [
                      mention["username"] for mention in tweet["entities"]["mentions"]
            ]
            new_txt = tweet["text"]
            # Remove all mentions in the start
            for user in users:
                new_txt = new_txt.replace(f"@{user}", "")

            new_txt = new_txt.strip()


            if (new_txt == ""):
                api.create_tweet(text=text.upper(), reply_in_reply_to_tweet_id = reply_to)

        if "meta" in mentions.keys():
            if "newest_id" in mentions["meta"].keys():
                last_tweet_id = mentions["meta"]["newest_id"]

    time.sleep(10)