diff --git a/telethon/extensions/tcp_client.py b/telethon/extensions/tcp_client.py
index 6feb9841..5255513a 100644
--- a/telethon/extensions/tcp_client.py
+++ b/telethon/extensions/tcp_client.py
@@ -14,7 +14,7 @@ class TcpClient:
 
         if isinstance(timeout, timedelta):
             self.timeout = timeout.seconds
-        elif isinstance(timeout, int) or isinstance(timeout, float):
+        elif isinstance(timeout, (int, float)):
             self.timeout = float(timeout)
         else:
             raise ValueError('Invalid timeout type', type(timeout))
diff --git a/telethon/telegram_bare_client.py b/telethon/telegram_bare_client.py
index e8e8b7fb..6e1d9b55 100644
--- a/telethon/telegram_bare_client.py
+++ b/telethon/telegram_bare_client.py
@@ -808,8 +808,9 @@ class TelegramBareClient:
 
                 try:
                     import socks
-                    if isinstance(error, socks.GeneralProxyError) or \
-                            isinstance(error, socks.ProxyConnectionError):
+                    if isinstance(error, (
+                            socks.GeneralProxyError, socks.ProxyConnectionError
+                    )):
                         # This is a known error, and it's not related to
                         # Telegram but rather to the proxy. Disconnect and
                         # hand it over to the main thread.
diff --git a/telethon/tl/entity_database.py b/telethon/tl/entity_database.py
index c772e665..554e2a5a 100644
--- a/telethon/tl/entity_database.py
+++ b/telethon/tl/entity_database.py
@@ -74,9 +74,7 @@ class EntityDatabase:
                     getattr(p, 'access_hash', 0)  # chats won't have hash
 
                 if self.enabled_full:
-                    if isinstance(e, User) \
-                            or isinstance(e, Chat) \
-                            or isinstance(e, Channel):
+                    if isinstance(e, (User, Chat, Channel)):
                         new.append(e)
             except ValueError:
                 pass
diff --git a/telethon/update_state.py b/telethon/update_state.py
index 995e3eb2..7560c7d3 100644
--- a/telethon/update_state.py
+++ b/telethon/update_state.py
@@ -149,8 +149,7 @@ class UpdateState:
                     self._updates.append(update.update)
                     self._updates_available.set()
 
-                elif isinstance(update, tl.Updates) or \
-                        isinstance(update, tl.UpdatesCombined):
+                elif isinstance(update, (tl.Updates, tl.UpdatesCombined)):
                     self._updates.extend(update.updates)
                     self._updates_available.set()
 
diff --git a/telethon/utils.py b/telethon/utils.py
index 3fa84155..d8bfb89f 100644
--- a/telethon/utils.py
+++ b/telethon/utils.py
@@ -37,7 +37,7 @@ def get_display_name(entity):
         else:
             return '(No name)'
 
-    if isinstance(entity, Chat) or isinstance(entity, Channel):
+    if isinstance(entity, (Chat, Channel)):
         return entity.title
 
     return '(unknown)'
@@ -50,8 +50,7 @@ def get_extension(media):
     """Gets the corresponding extension for any Telegram media"""
 
     # Photos are always compressed as .jpg by Telegram
-    if (isinstance(media, UserProfilePhoto) or isinstance(media, ChatPhoto) or
-            isinstance(media, MessageMediaPhoto)):
+    if isinstance(media, (UserProfilePhoto, ChatPhoto, MessageMediaPhoto)):
         return '.jpg'
 
     # Documents will come with a mime type
@@ -87,12 +86,10 @@ def get_input_peer(entity, allow_self=True):
         else:
             return InputPeerUser(entity.id, entity.access_hash)
 
-    if any(isinstance(entity, c) for c in (
-            Chat, ChatEmpty, ChatForbidden)):
+    if isinstance(entity, (Chat, ChatEmpty, ChatForbidden)):
         return InputPeerChat(entity.id)
 
-    if any(isinstance(entity, c) for c in (
-            Channel, ChannelForbidden)):
+    if isinstance(entity, (Channel, ChannelForbidden)):
         return InputPeerChannel(entity.id, entity.access_hash)
 
     # Less common cases
@@ -122,7 +119,7 @@ def get_input_channel(entity):
     if type(entity).SUBCLASS_OF_ID == 0x40f202fd:  # crc32(b'InputChannel')
         return entity
 
-    if isinstance(entity, Channel) or isinstance(entity, ChannelForbidden):
+    if isinstance(entity, (Channel, ChannelForbidden)):
         return InputChannel(entity.id, entity.access_hash)
 
     if isinstance(entity, InputPeerChannel):
@@ -266,7 +263,7 @@ def get_input_media(media, user_caption=None, is_photo=False):
     if isinstance(media, MessageMediaGame):
         return InputMediaGame(id=media.game.id)
 
-    if isinstance(media, ChatPhoto) or isinstance(media, UserProfilePhoto):
+    if isinstance(media, (ChatPhoto, UserProfilePhoto)):
         if isinstance(media.photo_big, FileLocationUnavailable):
             return get_input_media(media.photo_small, is_photo=True)
         else:
@@ -291,10 +288,9 @@ def get_input_media(media, user_caption=None, is_photo=False):
             venue_id=media.venue_id
         )
 
-    if any(isinstance(media, t) for t in (
+    if isinstance(media, (
             MessageMediaEmpty, MessageMediaUnsupported,
-            FileLocationUnavailable, ChatPhotoEmpty,
-            UserProfilePhotoEmpty)):
+            ChatPhotoEmpty, UserProfilePhotoEmpty, FileLocationUnavailable)):
         return InputMediaEmpty()
 
     if isinstance(media, Message):
@@ -319,11 +315,11 @@ def get_peer_id(peer, add_mark=False):
         peer = get_input_peer(peer, allow_self=False)
 
     # Set the right ID/kind, or raise if the TLObject is not recognised
-    if isinstance(peer, PeerUser) or isinstance(peer, InputPeerUser):
+    if isinstance(peer, (PeerUser, InputPeerUser)):
         return peer.user_id
-    elif isinstance(peer, PeerChat) or isinstance(peer, InputPeerChat):
+    elif isinstance(peer, (PeerChat, InputPeerChat)):
         return -peer.chat_id if add_mark else peer.chat_id
-    elif isinstance(peer, PeerChannel) or isinstance(peer, InputPeerChannel):
+    elif isinstance(peer, (PeerChannel, InputPeerChannel)):
         i = peer.channel_id
         if add_mark:
             # Concat -100 through math tricks, .to_supergroup() on Madeline