fixed some warnings

src/data.py

@@ -96,7 +96,7 @@ class Message():
         self.user = user
         self.guild = guild
         self.to_from = to_from
-        self.trade = None
+        self.trade: Union[Trade, None] = None
         if self.channel is Channel.WHISPER:
             self.parse_trade()
 

src/gui.py

@@ -4,6 +4,7 @@ from tkinter import Button, Label
 from .data import Message
 from src import sendkeys
 from typing import Callable
+from src.data import log
 
 
 class Gui(Tk):
@@ -28,6 +29,7 @@ class Gui(Tk):
         if message.user not in self.tabs:
             self.tabs[message.user] = {'tab': ttk.Frame(self.tab_control, style='BW.TLabel')}
         tab = self.tabs[message.user]['tab']
+        if message.trade is not None:
             if message.trade.item not in self.tabs[message.user]:
                 self.tabs[message.user][message.trade.item] = (tab, message)
                 ttk.Label(tab, text=message.trade.item, style='BW.TLabel').pack(anchor='e', side='left')
@@ -43,6 +45,8 @@ class Gui(Tk):
                 # Button(tab, text='Wait',  command=lambda mess=message: self.wait_callback(message, tab)).pack(anchor='e', side='left')
                 # Button(tab, text='X',  command=lambda mess=message: self.destroy_tab(message, tab)).pack(anchor='e', side='left')
                 self.tab_control.add(tab, text=message.user)
+        else:
+            log.warning(f'Trade in message "{str(message)}" is None')
 
     def add_button(self, tab: ttk.Frame, text: str, callback: Callable, message: Message) -> None:
         Button(tab, text=text, command=lambda: callback(message, tab)).pack(anchor='e', side='left')