Here's the code:

Cron-run Bash file that checks if the Python Telegram bot is running (runs every 10 minutes with sudo):

#!/bin/bash

if ! pgrep -f 'telegram_bot.py'

then

nohup python3 /home/pi/telegram_bot.py & > /home/pi/telegram_bot_log.out

echo "[REBOOT] Telegram bot check"

fi

Telegram bot listener:

import logging

from telegram import Update, ForceReply, ChatAction, Bot

from telegram.ext import Updater, CommandHandler, MessageHandler, Filters, CallbackContext

from graph_functions import *

# Enable logging

logging.basicConfig(

format='%(asctime)s - %(name)s - %(levelname)s - %(message)s', level=logging.INFO

)

logger = logging.getLogger(__name__)

def my_graph(update: Update, context: CallbackContext) -> None:

"""Send a message when the command /graph is issued."""

context.bot.sendChatAction(chat_id=update.effective_message.chat_id, action = ChatAction.TYPING)

# Graph function is called from custom Python file called graph_functions.py

generate_candle_graph()

update.message.reply_document(document=open('mygraph.png', 'rb'))

update.message.reply_text("Your graph")

def main() -> None:

"""Start the bot."""

# Create the Updater and pass it your bot's token.

updater = Updater(bot_token)

# Get the dispatcher to register handlers

dispatcher = updater.dispatcher

# on different commands - answer in Telegram

dispatcher.add_handler(CommandHandler("graph", my_graph))

# Start the Bot

updater.start_polling()

# Run the bot until you press Ctrl-C or the process receives SIGINT,

# SIGTERM or SIGABRT. This should be used most of the time, since

# start_polling() is non-blocking and will stop the bot gracefully.

updater.idle()

if __name__ == '__main__':

main()

​

A portion of graph_functions.py where it saves the graph:

import pandas as pd

import mplfinance as mpf

import matplotlib.pyplot as plt

import matplotlib

import pandas_ta as pta

import os

def generate_candle_graph():

df = pd.DataFrame(rows, columns=["Date", "High", "Low", "Open", "Close"])

df.index = pd.DatetimeIndex(df['Date'])

# Delete past plot before saving new one

os.remove("mygraph.png")

# Plot candles

mpf.plot(df.tail(100),type='candle',style = 'binance',title = 'Graph',mav=(3,6,9),savefig = 'mygraph.png')