Fix telegram imports to match v20.0

freqtrade/rpc/telegram.py

@@ -17,11 +17,12 @@ from typing import Any, Callable, Dict, List, Optional, Union
 
 import arrow
 from tabulate import tabulate
-from telegram import (MAX_MESSAGE_LENGTH, CallbackQuery, InlineKeyboardButton, InlineKeyboardMarkup,
-                      KeyboardButton, ParseMode, ReplyKeyboardMarkup, Update)
+from telegram import (CallbackQuery, InlineKeyboardButton, InlineKeyboardMarkup, KeyboardButton,
+                      ReplyKeyboardMarkup, Update)
+from telegram.constants import MessageLimit, ParseMode
 from telegram.error import BadRequest, NetworkError, TelegramError
 from telegram.ext import CallbackContext, CallbackQueryHandler, CommandHandler, Updater
-from telegram.utils.helpers import escape_markdown
+from telegram.helpers import escape_markdown
 
 from freqtrade.__init__ import __version__
 from freqtrade.constants import DUST_PER_COIN, Config
@@ -33,6 +34,9 @@ from freqtrade.rpc import RPC, RPCException, RPCHandler
 from freqtrade.rpc.rpc_types import RPCSendMsg
 
 
+MAX_MESSAGE_LENGTH = MessageLimit.MAX_TEXT_LENGTH
+
+
 logger = logging.getLogger(__name__)
 
 logger.debug('Included module rpc.telegram ...')