From 523ede6a82ad06ad729341b5feb743798ca02ee8 Mon Sep 17 00:00:00 2001
From: David Brochart <david.brochart@gmail.com>
Date: Thu, 24 Jul 2025 14:10:21 +0200
Subject: [PATCH 1/3] Remove traitlets dependency

---
 comm/base_comm.py | 15 ++++++++++++---
 pyproject.toml    |  3 ---
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/comm/base_comm.py b/comm/base_comm.py
index 151e85f..39aea03 100644
--- a/comm/base_comm.py
+++ b/comm/base_comm.py
@@ -9,8 +9,6 @@
 import typing as t
 import uuid
 
-from traitlets.utils.importstring import import_item
-
 import comm
 
 if t.TYPE_CHECKING:
@@ -212,7 +210,18 @@ def register_target(self, target_name: str, f: CommTargetCallback | str) -> None
         f can be a Python callable or an import string for one.
         """
         if isinstance(f, str):
-            f = import_item(f)
+            parts = f.rsplit(".", 1)
+            if len(parts) == 2:
+                # called with 'foo.bar....'
+                package, obj = parts
+                module = __import__(package, fromlist=[obj])
+                try:
+                    f = getattr(module, obj)
+                except AttributeError as e:
+                    raise ImportError("No module named %s" % obj) from e
+            else:
+                # called with un-dotted string
+                f = __import__(parts[0])
 
         self.targets[target_name] = t.cast(CommTargetCallback, f)
 
diff --git a/pyproject.toml b/pyproject.toml
index a7d441d..3b9c7da 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,9 +23,6 @@ classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
 ]
-dependencies = [
-    "traitlets>=4",
-]
 
 [project.optional-dependencies]
 test = [

From 973761cbe269cf946b8b9a08d6a50d1e48fa579a Mon Sep 17 00:00:00 2001
From: David Brochart <david.brochart@gmail.com>
Date: Thu, 24 Jul 2025 14:18:33 +0200
Subject: [PATCH 2/3] lint

---
 comm/base_comm.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/comm/base_comm.py b/comm/base_comm.py
index 39aea03..dfad501 100644
--- a/comm/base_comm.py
+++ b/comm/base_comm.py
@@ -218,7 +218,7 @@ def register_target(self, target_name: str, f: CommTargetCallback | str) -> None
                 try:
                     f = getattr(module, obj)
                 except AttributeError as e:
-                    raise ImportError("No module named %s" % obj) from e
+                    raise ImportError(f"No module named {obj}") from e
             else:
                 # called with un-dotted string
                 f = __import__(parts[0])

From 5127a001146b51baf708096b837561f7a0e257a9 Mon Sep 17 00:00:00 2001
From: David Brochart <david.brochart@gmail.com>
Date: Thu, 24 Jul 2025 14:25:27 +0200
Subject: [PATCH 3/3] again

---
 comm/base_comm.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/comm/base_comm.py b/comm/base_comm.py
index dfad501..92aa6d8 100644
--- a/comm/base_comm.py
+++ b/comm/base_comm.py
@@ -218,7 +218,8 @@ def register_target(self, target_name: str, f: CommTargetCallback | str) -> None
                 try:
                     f = getattr(module, obj)
                 except AttributeError as e:
-                    raise ImportError(f"No module named {obj}") from e
+                    error_msg = f"No module named {obj}"
+                    raise ImportError(error_msg) from e
             else:
                 # called with un-dotted string
                 f = __import__(parts[0])