It is Twitter Bot.

bot.py

"""bot.py
    It is Twitter Bot.
    If someone(X) send an Image(with one or more person in it) to you Twitter Handle, it will automatically remove the background of the image and  sent 'X' a tweet containing the image without the background.

    Requires
    --------

    Tweepy
    ------

    installation : pip install tweepy

    Pillow
    ------

    installation : pip install Pillow

    Python Decouple
    ---------------

    installation : pip install python-decouple

    Twitter Account and API credentials
    -----------------------------------

    setup: Login to developer.twitter.com, create an app and generate Consumer Key, Consumer Secret, Access Token and Access Secret

    remove.bg account and api
    -------------------------

    setup: Login to https://remove.bg and create an account and create a free API key. Free API provides 50 calls per month.

    Usage
    -----

    Create .env file in the same directory and copy paste all the credentials of twitter and remove.bg API. Run the script python bot.py. Tweet at the handle with a pic.
"""


import tweepy
import requests
from decouple import config
from io import BytesIO
from PIL import Image


# authentication

auth = tweepy.OAuthHandler(config("CONSUMER_KEY"), config("CONSUMER_SECRET"))
auth.set_access_token(config("ACCESS_TOKEN"), config("ACCESS_SECRET"))

# API instance

api = tweepy.API(auth)


def remove_bg(filename):
    """Returns the image without the background

    Requires
    --------
    remove.bg api key : save it in .env file as BG_API_KEY

    request module

    Parameters
    ----------
    filename : str (default is 'temp.png')
        Filename of the un-edited image downloaded by tweet_image() method with default name 'temp.png'

    Returns
    -------
    no-bg.png : png
        Image without the background.
    """

    response = requests.post(
        'https://api.remove.bg/v1.0/removebg',
        files={'image_file': open(filename, 'rb')},
        data={'size': 'auto'},
        headers={'X-Api-Key': config('BG_API_KEY')},)
    if response.status_code == requests.codes.ok:
        with open('no-bg.png', 'wb') as out:
            out.write(response.content)
    else:
        print("Error:", response.status_code, response.text)


def tweet_image(url, username, status_id):
    """Pick up the tweet with an image from Twitter Stream, downloads the image and saves it as temp.png, pass that image to remove_bg() method and then tweet the image without background ('no-bg.png') to the user

    Parameters
    ----------
    url : url
        url of the tweet stream.
    username: str
        auto-populated by on_status method of MyStreamListener class.
    status_id :
        auto-populated by on_status method of MyStreamListener class.

    Sends
    -----
    A tweet in reply to the original tweet containing the image without the background
    """

    filename = 'temp.png'
    response = requests.get(url, stream=True)
    if response.status_code == 200:
        i = Image.open(BytesIO(request.content))
        i.save(filename)
        remove_bg(filename)
        api.update_with_media('no-bg.png', status=f'@{username}, Here is the picture without the background', in_reply_to_status_id=status_id)
    else:
        print("unable to download image")


class MyStreamListener(tweepy.StreamListener):
    """
    A Stream listener which inherits tweepy.StreamListener
    It looks for a tweet matching the filter (i.e. tweet mentioning @saralgyaan) then fetches the username and status_id of the tweet, checks if the tweet has an image and runs tweet_image() method

    Attributes
    ----------
    status:
        Twitter status matching the filter.

    Methods
    -------
    on_status
        Runs tweet_image() method on meeting the conditions
    """

    def on_status(self, status):
        """
        It looks for a tweet matching the filter (i.e. tweet mentioning @saralgyaan) then fetches the username and status_id of the tweet, checks if the tweet has an image and runs tweet_image() method

        Attributes
        ----------
        status:
            Twitter status matching the filter.

        Runs
        ----
        tweet_image() method
        """
        username = status.user.screen_name
        status_id = status.id

        if 'media' in status.entities:
            for image in status.entities['media']:
                tweet_image(image['media_url'], username, status_id)


my_stream_listener = MyStreamListener()
stream = tweepy.Stream(auth, my_stream_listener)
stream.filter(track=['@saral_gyaan']) #looks for tweet with @saralgyaan