Comentário Inicial

Fonte: https://medium.com/@mdcg.dev/desenvolvendo-o-seu-primeiro-chatbot-no-telegram-com-python-a9ad787bdf6

src/conf/.env

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+TELEGRAM_TOKEN=
+BASE_API_URL=https://http.cat/

src/conf/settings.py

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+import os
+
+from dotenv import load_dotenv
+
+load_dotenv()
+
+TELEGRAM_TOKEN = os.getenv("TELEGRAM_TOKEN")
+BASE_API_URL = os.getenv("BASE_API_URL")

src/core.py

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+
+from telegram.ext import CommandHandler, Filters, MessageHandler, Updater
+
+from conf.settings import BASE_API_URL, TELEGRAM_TOKEN
+
+
+def start(bot, update):
+    response_message = "=^._.^="
+    bot.send_message(
+        chat_id=update.message.chat_id,
+        text=response_message
+    )
+
+
+def http_cats(bot, update, args):
+    bot.sendPhoto(
+        chat_id=update.message.chat_id,
+        photo=BASE_API_URL + args[0]
+    )
+
+
+def unknown(bot, update):
+    response_message = "Meow? =^._.^="
+    bot.send_message(
+        chat_id=update.message.chat_id,
+        text=response_message
+    )
+
+
+def main():
+    updater = Updater(token=TELEGRAM_TOKEN)
+
+    dispatcher = updater.dispatcher
+
+    dispatcher.add_handler(
+        CommandHandler('start', start)
+    )
+    dispatcher.add_handler(
+        CommandHandler('http', http_cats, pass_args=True)
+    )
+    dispatcher.add_handler(
+        MessageHandler(Filters.command, unknown)
+    )
+
+    updater.start_polling()
+
+    updater.idle()
+
+
+if __name__ == '__main__':
+    print("press CTRL + C to cancel.")
+    main()