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PR: Defer import of SpyderKernelSpec #491

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Merged
jitseniesen merged 1 commit into from
Aug 16, 2025
Merged

PR: Defer import of SpyderKernelSpec #491

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16 changes: 16 additions & 0 deletions spyder_notebook/server/kernelspec.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,16 @@
# Copyright © Spyder Project Contributors
# Licensed under the terms of the MIT License
# (see spyder_notebook/__init__.py for details)

"""Variant of Spyder's kernel spec for the use in the notebook server."""

# Third-party import
from spyder.plugins.ipythonconsole.utils.kernelspec import SpyderKernelSpec


class SpyderNotebookKernelSpec(SpyderKernelSpec):
"""Variant of SpyderKernelSpec which specifies our provisioner"""

metadata = {
'kernel_provisioner': {'provisioner_name': 'spyder-local-provisioner'}
}
17 changes: 6 additions & 11 deletions spyder_notebook/server/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -15,9 +15,8 @@
from notebook.app import (
aliases, flags, JupyterNotebookApp, NotebookBaseHandler)
import psutil
from spyder.plugins.ipythonconsole.utils.kernelspec import SpyderKernelSpec
from tornado import web
from traitlets import default, Bool, Unicode
from traitlets import default, Bool, Type, Unicode


HERE = os.path.dirname(__file__)
Expand Down Expand Up @@ -94,20 +93,16 @@ async def send_signal(self, signum):
await super().send_signal(signum)


class SpyderNotebookKernelSpec(SpyderKernelSpec):
"""Variant of SpyderKernelSpec which specifies our provisioner"""
metadata = {
'kernel_provisioner': {'provisioner_name': 'spyder-local-provisioner'}
}


class SpyderKernelSpecManager(KernelSpecManager):
"""Variant of Jupyter's KernelSpecManager"""
# Ensure that there is only one kernel spec, the default one
allowed_kernelspecs = 'python3'

# Ensure that default kernel spec is our own kernel spec
kernel_spec_class = SpyderNotebookKernelSpec
# Ensure that default kernel spec is our own kernel spec.
# This is given as a string to defer the import.
kernel_spec_class = Type(
'spyder_notebook.server.kernelspec.SpyderNotebookKernelSpec'
)


class SpyderServerApp(ServerApp):
Expand Down
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