From e69c1867828eb54d51e2d484ef772400833b1255 Mon Sep 17 00:00:00 2001
From: Lonami Exo <totufals@hotmail.com>
Date: Sat, 7 Apr 2018 12:31:30 +0200
Subject: [PATCH] Support more filter types for convenience (#745)

---
 telethon/telegram_client.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/telethon/telegram_client.py b/telethon/telegram_client.py
index ab5260d2..736b9297 100644
--- a/telethon/telegram_client.py
+++ b/telethon/telegram_client.py
@@ -84,7 +84,8 @@ from .tl.types import (
     InputMessageEntityMentionName, DocumentAttributeVideo,
     UpdateEditMessage, UpdateEditChannelMessage, UpdateShort, Updates,
     MessageMediaWebPage, ChannelParticipantsSearch, PhotoSize, PhotoCachedSize,
-    PhotoSizeEmpty, MessageService, ChatParticipants
+    PhotoSizeEmpty, MessageService, ChatParticipants,
+    ChannelParticipantsBanned, ChannelParticipantsKicked
 )
 from .tl.types.messages import DialogsSlice
 from .tl.types.account import PasswordInputSettings, NoPassword
@@ -1211,7 +1212,12 @@ class TelegramClient(TelegramBareClient):
             or :tl:`ChatParticipants` for normal chats.
         """
         if isinstance(filter, type):
-            filter = filter()
+            if filter in (ChannelParticipantsBanned, ChannelParticipantsKicked,
+                          ChannelParticipantsSearch):
+                # These require a `q` parameter (support types for convenience)
+                filter = filter('')
+            else:
+                filter = filter()
 
         entity = self.get_input_entity(entity)
         if search and (filter or not isinstance(entity, InputPeerChannel)):