Update CI

.pre-commit-config.yaml

@@ -36,7 +36,7 @@ repos:
       - id: black
 
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.207
+    rev: v0.0.215
     hooks:
       - id: ruff
         args: ["--fix"]

ipykernel/connect.py

@@ -26,7 +26,8 @@ def get_connection_file(app=None):
         from ipykernel.kernelapp import IPKernelApp
 
         if not IPKernelApp.initialized():
-            raise RuntimeError("app not specified, and not in a running Kernel")
+            msg = "app not specified, and not in a running Kernel"
+            raise RuntimeError(msg)
 
         app = IPKernelApp.instance()
     return filefind(app.connection_file, [".", app.connection_dir])

ipykernel/eventloops.py

@@ -473,9 +473,8 @@ def set_qt_api_env_from_gui(gui):
     }
     if loaded is not None and gui != 'qt':
         if qt_env2gui[loaded] != gui:
-            raise ImportError(
-                f'Cannot switch Qt versions for this session; must use {qt_env2gui[loaded]}.'
-            )
+            msg = f'Cannot switch Qt versions for this session; must use {qt_env2gui[loaded]}.'
+            raise ImportError(msg)
 
     if qt_api is not None and gui != 'qt':
         if qt_env2gui[qt_api] != gui:
@@ -526,9 +525,8 @@ def set_qt_api_env_from_gui(gui):
             if 'QT_API' in os.environ.keys():
                 del os.environ['QT_API']
         else:
-            raise ValueError(
-                f'Unrecognized Qt version: {gui}. Should be "qt4", "qt5", "qt6", or "qt".'
-            )
+            msg = f'Unrecognized Qt version: {gui}. Should be "qt4", "qt5", "qt6", or "qt".'
+            raise ValueError(msg)
 
     # Do the actual import now that the environment variable is set to make sure it works.
     try:
@@ -543,7 +541,8 @@ def set_qt_api_env_from_gui(gui):
 def make_qt_app_for_kernel(gui, kernel):
     """Sets the `QT_API` environment variable if it isn't already set."""
     if hasattr(kernel, 'app'):
-        raise RuntimeError('Kernel already running a Qt event loop.')
+        msg = 'Kernel already running a Qt event loop.'
+        raise RuntimeError(msg)
 
     set_qt_api_env_from_gui(gui)
     # This import is guaranteed to work now:
@@ -566,10 +565,11 @@ def enable_gui(gui, kernel=None):
         if Application.initialized():
             kernel = getattr(Application.instance(), "kernel", None)
         if kernel is None:
-            raise RuntimeError(
+            msg = (
                 "You didn't specify a kernel,"
                 " and no IPython Application with a kernel appears to be running."
             )
+            raise RuntimeError(msg)
     if gui is None:
         # User wants to turn off integration; clear any evidence if Qt was the last one.
         if hasattr(kernel, 'app'):
@@ -581,7 +581,8 @@ def enable_gui(gui, kernel=None):
 
     loop = loop_map[gui]
     if loop and kernel.eventloop is not None and kernel.eventloop is not loop:
-        raise RuntimeError("Cannot activate multiple GUI eventloops")
+        msg = "Cannot activate multiple GUI eventloops"
+        raise RuntimeError(msg)
     kernel.eventloop = loop
     # We set `eventloop`; the function the user chose is executed in `Kernel.enter_eventloop`, thus
     # any exceptions raised during the event loop will not be shown in the client.

ipykernel/inprocess/channels.py

@@ -40,7 +40,8 @@ def call_handlers(self, msg):
 
         Subclasses should override this method to handle incoming messages.
         """
-        raise NotImplementedError("call_handlers must be defined in a subclass.")
+        msg = "call_handlers must be defined in a subclass."
+        raise NotImplementedError(msg)
 
     def flush(self, timeout=1.0):
         """Flush the channel."""

ipykernel/inprocess/client.py

@@ -154,7 +154,8 @@ def history(self, raw=True, output=False, hist_access_type="range", **kwds):
     def shutdown(self, restart=False):
         """Handle shutdown."""
         # FIXME: What to do here?
-        raise NotImplementedError("Cannot shutdown in-process kernel")
+        msg = "Cannot shutdown in-process kernel"
+        raise NotImplementedError(msg)
 
     def kernel_info(self):
         """Request kernel info."""
@@ -175,7 +176,8 @@ def comm_info(self, target_name=None):
     def input(self, string):
         """Handle kernel input."""
         if self.kernel is None:
-            raise RuntimeError("Cannot send input reply. No kernel exists.")
+            msg = "Cannot send input reply. No kernel exists."
+            raise RuntimeError(msg)
         self.kernel.raw_input_str = string
 
     def is_complete(self, code):
@@ -188,7 +190,8 @@ def _dispatch_to_kernel(self, msg):
         """Send a message to the kernel and handle a reply."""
         kernel = self.kernel
         if kernel is None:
-            raise RuntimeError("Cannot send request. No kernel exists.")
+            msg = "Cannot send request. No kernel exists."
+            raise RuntimeError(msg)
 
         stream = kernel.shell_stream
         self.session.send(stream, msg)

ipykernel/inprocess/manager.py

@@ -66,11 +66,13 @@ def _kill_kernel(self):
 
     def interrupt_kernel(self):
         """Interrupt the kernel."""
-        raise NotImplementedError("Cannot interrupt in-process kernel.")
+        msg = "Cannot interrupt in-process kernel."
+        raise NotImplementedError(msg)
 
     def signal_kernel(self, signum):
         """Send a signal to the kernel."""
-        raise NotImplementedError("Cannot signal in-process kernel.")
+        msg = "Cannot signal in-process kernel."
+        raise NotImplementedError(msg)
 
     def is_alive(self):
         """Test if the kernel is alive."""

ipykernel/iostream.py

@@ -312,7 +312,8 @@ def fileno(self):
         if getattr(self, "_original_stdstream_copy", None) is not None:
             return self._original_stdstream_copy
         else:
-            raise io.UnsupportedOperation("fileno")
+            msg = "fileno"
+            raise io.UnsupportedOperation(msg)
 
     def _watch_pipe_fd(self):
         """
@@ -415,7 +416,8 @@ def __init__(
             if hasattr(echo, "read") and hasattr(echo, "write"):
                 self.echo = echo
             else:
-                raise ValueError("echo argument must be a file like object")
+                msg = "echo argument must be a file like object"
+                raise ValueError(msg)
 
     def isatty(self):
         """Return a bool indicating whether this is an 'interactive' stream.
@@ -540,7 +542,8 @@ def write(self, string: str) -> Optional[int]:  # type:ignore[override]
         """
 
         if not isinstance(string, str):
-            raise TypeError(f"write() argument must be str, not {type(string)}")
+            msg = f"write() argument must be str, not {type(string)}"
+            raise TypeError(msg)
 
         if self.echo is not None:
             try:
@@ -550,7 +553,8 @@ def write(self, string: str) -> Optional[int]:  # type:ignore[override]
                     print(f"Write failed: {e}", file=sys.__stderr__)
 
         if self.pub_thread is None:
-            raise ValueError("I/O operation on closed file")
+            msg = "I/O operation on closed file"
+            raise ValueError(msg)
         else:
 
             is_child = not self._is_master_process()
@@ -573,7 +577,8 @@ def write(self, string: str) -> Optional[int]:  # type:ignore[override]
     def writelines(self, sequence):
         """Write lines to the stream."""
         if self.pub_thread is None:
-            raise ValueError("I/O operation on closed file")
+            msg = "I/O operation on closed file"
+            raise ValueError(msg)
         else:
             for string in sequence:
                 self.write(string)

ipykernel/jsonutil.py

@@ -146,10 +146,11 @@ def json_clean(obj):  # pragma: no cover
         nkeys = len(obj)
         nkeys_collapsed = len(set(map(str, obj)))
         if nkeys != nkeys_collapsed:
-            raise ValueError(
+            msg = (
                 "dict cannot be safely converted to JSON: "
                 "key collision would lead to dropped values"
             )
+            raise ValueError(msg)
         # If all OK, proceed by making the new dict that will be json-safe
         out = {}
         for k, v in obj.items():

ipykernel/kernelbase.py

@@ -1146,9 +1146,8 @@ def _send_abort_reply(self, stream, msg, idents):
     def _no_raw_input(self):
         """Raise StdinNotImplementedError if active frontend doesn't support
         stdin."""
-        raise StdinNotImplementedError(
-            "raw_input was called, but this frontend does not support stdin."
-        )
+        msg = "raw_input was called, but this frontend does not support stdin."
+        raise StdinNotImplementedError(msg)
 
     def getpass(self, prompt="", stream=None):
         """Forward getpass to frontends
@@ -1158,9 +1157,8 @@ def getpass(self, prompt="", stream=None):
         StdinNotImplementedError if active frontend doesn't support stdin.
         """
         if not self._allow_stdin:
-            raise StdinNotImplementedError(
-                "getpass was called, but this frontend does not support input requests."
-            )
+            msg = "getpass was called, but this frontend does not support input requests."
+            raise StdinNotImplementedError(msg)
         if stream is not None:
             import warnings
 
@@ -1184,9 +1182,8 @@ def raw_input(self, prompt=""):
         StdinNotImplementedError if active frontend doesn't support stdin.
         """
         if not self._allow_stdin:
-            raise StdinNotImplementedError(
-                "raw_input was called, but this frontend does not support input requests."
-            )
+            msg = "raw_input was called, but this frontend does not support input requests."
+            raise StdinNotImplementedError(msg)
         return self._input_request(
             str(prompt),
             self._parent_ident["shell"],
@@ -1229,7 +1226,8 @@ def _input_request(self, prompt, ident, parent, password=False):
                         break
             except KeyboardInterrupt:
                 # re-raise KeyboardInterrupt, to truncate traceback
-                raise KeyboardInterrupt("Interrupted by user") from None
+                msg = "Interrupted by user"
+                raise KeyboardInterrupt(msg) from None
             except Exception:
                 self.log.warning("Invalid Message:", exc_info=True)
 

ipykernel/parentpoller.py

@@ -66,7 +66,8 @@ def __init__(self, interrupt_handle=None, parent_handle=None):
         assert interrupt_handle or parent_handle
         super().__init__()
         if ctypes is None:
-            raise ImportError("ParentPollerWindows requires ctypes")
+            msg = "ParentPollerWindows requires ctypes"
+            raise ImportError(msg)
         self.daemon = True
         self.interrupt_handle = interrupt_handle
         self.parent_handle = parent_handle

ipykernel/trio_runner.py

@@ -33,7 +33,8 @@ def interrupt(self, signum, frame):
         if self._cell_cancel_scope:
             self._cell_cancel_scope.cancel()
         else:
-            raise Exception("Kernel interrupted but no cell is running")
+            msg = "Kernel interrupted but no cell is running"
+            raise Exception(msg)
 
     def run(self):
         """Run the loop."""

ipykernel/zmqshell.py

@@ -323,7 +323,8 @@ def less(self, arg_s):
 
         Files ending in .py are syntax-highlighted."""
         if not arg_s:
-            raise UsageError("Missing filename.")
+            msg = "Missing filename."
+            raise UsageError(msg)
 
         if arg_s.endswith(".py"):
             assert self.shell is not None
@@ -628,7 +629,8 @@ def system_piped(self, cmd):
             # pexpect or pipes to read from.  Users can always just call
             # os.system() or use ip.system=ip.system_raw
             # if they really want a background process.
-            raise OSError("Background processes not supported.")
+            msg = "Background processes not supported."
+            raise OSError(msg)
 
         # we explicitly do NOT return the subprocess status code, because
         # a non-None value would trigger :func:`sys.displayhook` calls.

pyproject.toml

@@ -111,7 +111,7 @@ dependencies = ["mypy>=0.990"]
 test = "mypy --install-types --non-interactive {args:.}"
 
 [tool.hatch.envs.lint]
-dependencies = ["black==22.12.0", "mdformat>0.7", "ruff==0.0.207"]
+dependencies = ["black==22.12.0", "mdformat>0.7", "ruff==0.0.215"]
 detached = true
 [tool.hatch.envs.lint.scripts]
 style = [
@@ -208,7 +208,7 @@ target-version = ["py37"]
 target-version = "py37"
 line-length = 100
 select = [
-  "A", "B", "C", "E", "F", "FBT", "I", "N", "Q", "RUF", "S", "T",
+  "A", "B", "C", "E", "EM", "F", "FBT", "I", "N", "Q", "RUF", "S", "T",
   "UP", "W", "YTT",
 ]
 ignore = [
@@ -261,7 +261,8 @@ unfixable = [
 # B007 Loop control variable `i` not used within the loop body.
 # N802 Function name `assertIn` should be lowercase
 # F841 Local variable `t` is assigned to but never used
-"ipykernel/tests/*" = ["B011", "F841", "C408", "E402", "T201", "B007", "N802", "F841"]
+# EM101 Exception must not use a string literal, assign to variable first
+"ipykernel/tests/*" = ["B011", "F841", "C408", "E402", "T201", "B007", "N802", "F841", "EM101", "EM102"]
 
 [tool.interrogate]
 ignore-init-module=true
@@ -275,3 +276,4 @@ exclude = ["docs", "*/tests"]
 
 [tool.check-wheel-contents]
 toplevel = ["ipykernel/", "ipykernel_launcher.py"]
+ignore = ["W002"]