@@ -0,0 +1,415 @@
+from typing import Type, TypeVar%0A%0AT = TypeVar(%22T%22)%0A%0A%0Aclass MissingAggregateMethod(Exception):%0A    def __init__(self, cls: Type%5BT%5D, method: str) -%3E None:%0A        self.clsname = cls.__name__%0A        self.method = method%0A        super().__init__(self.clsname, self.method)%0A%0A    def __str__(self) -%3E str:%0A        return (%0A            f%22Missing aggregate method %60%7Bself.method%7D%60 on UDAF class %60%7Bself.clsname%7D%60%22%0A        )%0A

add missing exceptions.py module