first comit

venv/lib/python3.10/site-packages/jupyter_client/channelsabc.py

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+"""Abstract base classes for kernel client channels"""
+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+import abc
+
+
+class ChannelABC(metaclass=abc.ABCMeta):
+    """A base class for all channel ABCs."""
+
+    @abc.abstractmethod
+    def start(self) -> None:
+        """Start the channel."""
+        pass
+
+    @abc.abstractmethod
+    def stop(self) -> None:
+        """Stop the channel."""
+        pass
+
+    @abc.abstractmethod
+    def is_alive(self) -> bool:
+        """Test whether the channel is alive."""
+        pass
+
+
+class HBChannelABC(ChannelABC):
+    """HBChannel ABC.
+
+    The docstrings for this class can be found in the base implementation:
+
+    `jupyter_client.channels.HBChannel`
+    """
+
+    @abc.abstractproperty
+    def time_to_dead(self) -> float:
+        pass
+
+    @abc.abstractmethod
+    def pause(self) -> None:
+        """Pause the heartbeat channel."""
+        pass
+
+    @abc.abstractmethod
+    def unpause(self) -> None:
+        """Unpause the heartbeat channel."""
+        pass
+
+    @abc.abstractmethod
+    def is_beating(self) -> bool:
+        """Test whether the channel is beating."""
+        pass