Add delete_chat_photo method

pyrogram/client/methods/chats/__init__.py

@@ -16,6 +16,7 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with Pyrogram.  If not, see <http://www.gnu.org/licenses/>.
 
+from .delete_chat_photo import DeleteChatPhoto
 from .export_chat_invite_link import ExportChatInviteLink
 from .get_chat import GetChat
 from .get_chat_members import GetChatMembers
@@ -38,6 +39,7 @@ class Chats(
     RestrictChatMember,
     PromoteChatMember,
     GetChatMembers,
-    SetChatPhoto
+    SetChatPhoto,
+    DeleteChatPhoto
 ):
     pass

pyrogram/client/methods/chats/delete_chat_photo.py

@@ -0,0 +1,45 @@
+# Pyrogram - Telegram MTProto API Client Library for Python
+# Copyright (C) 2017-2018 Dan Tès <https://github.com/delivrance>
+#
+# This file is part of Pyrogram.
+#
+# Pyrogram is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published
+# by the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Pyrogram is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with Pyrogram.  If not, see <http://www.gnu.org/licenses/>.
+
+from pyrogram.api import functions, types
+from ...ext import BaseClient
+
+
+class DeleteChatPhoto(BaseClient):
+    def delete_chat_photo(self, chat_id: int or str):
+        # TODO: Docstrings
+        peer = self.resolve_peer(chat_id)
+
+        if isinstance(peer, types.InputPeerChat):
+            self.send(
+                functions.messages.EditChatPhoto(
+                    chat_id=peer.chat_id,
+                    photo=types.InputChatPhotoEmpty()
+                )
+            )
+        elif isinstance(peer, types.InputPeerChannel):
+            self.send(
+                functions.channels.EditPhoto(
+                    channel=peer,
+                    photo=types.InputChatPhotoEmpty()
+                )
+            )
+        else:
+            raise ValueError("The chat_id \"{}\" belongs to a user".format(chat_id))
+
+        return True