Add errors factory skeleton

client/src/telethon/__init__.py

@@ -1,7 +1,8 @@
 from ._impl import tl as _tl
 from ._impl.client import Client, Config
+from ._impl.errors import errors
 from ._impl.mtproto import RpcError
 from ._impl.session import Session
 from .version import __version__
 
-__all__ = ["_tl", "Client", "Config", "RpcError", "Session"]
+__all__ = ["_tl", "Client", "Config", "errors", "RpcError", "Session"]

client/src/telethon/_impl/errors.py

@@ -0,0 +1,8 @@
+class ErrorFactory:
+    __slots__ = ()
+
+    def __getattribute__(self, name: str) -> ValueError:
+        raise NotImplementedError
+
+
+errors = ErrorFactory()

client/src/telethon/_impl/mtproto/mtp/types.py

@@ -15,6 +15,8 @@ class RpcError(ValueError):
     Only occurs when the answer to a request sent to Telegram is not the expected result.
     The library will never construct instances of this error by itself.
 
+    This is the parent class of all :data:`telethon.errors` subtypes.
+
     .. seealso::
 
         :doc:`/concepts/errors`