first comit

venv/lib/python3.10/site-packages/traitlets/utils/sentinel.py

@@ -0,0 +1,24 @@
+"""Sentinel class for constants with useful reprs"""
+
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
+from __future__ import annotations
+
+import typing as t
+
+
+class Sentinel:
+    def __init__(self, name: str, module: t.Any, docstring: str | None = None) -> None:
+        self.name = name
+        self.module = module
+        if docstring:
+            self.__doc__ = docstring
+
+    def __repr__(self) -> str:
+        return str(self.module) + "." + self.name
+
+    def __copy__(self) -> Sentinel:
+        return self
+
+    def __deepcopy__(self, memo: t.Any) -> Sentinel:
+        return self