venv added, updated

myenv/lib/python3.12/site-packages/reactivex/abc/observer.py

@@ -0,0 +1,48 @@
+from abc import ABC, abstractmethod
+from typing import Callable, Generic, TypeVar
+
+_T = TypeVar("_T")
+_T_in = TypeVar("_T_in", contravariant=True)
+
+OnNext = Callable[[_T], None]
+OnError = Callable[[Exception], None]
+OnCompleted = Callable[[], None]
+
+
+class ObserverBase(Generic[_T_in], ABC):
+    """Observer abstract base class
+
+    An Observer is the entity that receives all emissions of a
+    subscribed Observable.
+    """
+
+    __slots__ = ()
+
+    @abstractmethod
+    def on_next(self, value: _T_in) -> None:
+        """Notifies the observer of a new element in the sequence.
+
+        Args:
+            value: The received element.
+        """
+
+        raise NotImplementedError
+
+    @abstractmethod
+    def on_error(self, error: Exception) -> None:
+        """Notifies the observer that an exception has occurred.
+
+        Args:
+            error: The error that has occurred.
+        """
+
+        raise NotImplementedError
+
+    @abstractmethod
+    def on_completed(self) -> None:
+        """Notifies the observer of the end of the sequence."""
+
+        raise NotImplementedError
+
+
+__all__ = ["ObserverBase", "OnNext", "OnError", "OnCompleted"]