updater.dispatcher.add_handler(MessageHandler(Filters.photo, get_pic))
def get_pic(update, context):
photo = update.message.file_id
update.send_photo(chat_id=update.message.chat_id, photo=photo, reply_markup=full_keyboard())
def get_pic(update, context):
photo = update.message.photo[-1]
update.message.reply_photo(photo=photo, reply_markup=full_keyboard())