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Description
openedon Oct 1, 2024
I'm guessing either shinywidgets or ipyreact (or both) sets a hook somewhere on import.
This express app works for me:
from shiny.express import ui, render
from ipyreact import Widget
from shinywidgets import render_widget
ui.h1("yo")However, switching the ipyreact and shinywidget imports raises an error:
from shiny.express import ui, render
from shinywidgets import render_widget # <--- shinywidgets first now
from ipyreact import Widget
ui.h1("yo")Here's the traceback:
Process SpawnProcess-2:
Traceback (most recent call last):
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/traitlets/traitlets.py", line 632, in get
value = obj._trait_values[self.name]
KeyError: 'layout'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/shiny/express/_run.py", line 220, in run_express
exec(
File "/Users/machow/repos/reactable-py/app-ipyreact.py", line 4, in <module>
from ipyreact import Widget
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/ipyreact/__init__.py", line 8, in <module>
from .importmap import define_import_map
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/ipyreact/importmap.py", line 70, in <module>
define_import_map(
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/ipyreact/importmap.py", line 54, in define_import_map
_update_import_map()
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/ipyreact/importmap.py", line 66, in _update_import_map
_get_import_map_widget().import_map = _effective_import_map
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/ipyreact/importmap.py", line 61, in _get_import_map_widget
_import_map_widget = ImportMap(import_map=_effective_import_map)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/ipywidgets/widgets/widget.py", line 505, in __init__
Widget._call_widget_constructed(self)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/ipywidgets/widgets/widget.py", line 365, in _call_widget_constructed
Widget._widget_construction_callback(widget)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/shinywidgets/_shinywidgets.py", line 65, in init_shiny_widget
state, buffer_paths, buffers = _remove_buffers(w.get_state()) # type: ignore
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/ipywidgets/widgets/widget.py", line 615, in get_state
value = to_json(getattr(self, k), self)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/traitlets/traitlets.py", line 687, in __get__
return t.cast(G, self.get(obj, cls)) # the G should encode the Optional
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/traitlets/traitlets.py", line 635, in get
default = obj.trait_defaults(self.name)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/traitlets/traitlets.py", line 1897, in trait_defaults
return t.cast(Sentinel, self._get_trait_default_generator(names[0])(self))
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/traitlets/traitlets.py", line 602, in default
return t.cast(G, self.make_dynamic_default())
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/ipywidgets/widgets/trait_types.py", line 409, in make_dynamic_default
return self.klass(*(self.default_args or ()),
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/ipywidgets/widgets/widget_layout.py", line 86, in __init__
super().__init__(**kwargs)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/ipywidgets/widgets/widget.py", line 505, in __init__
Widget._call_widget_constructed(self)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/ipywidgets/widgets/widget.py", line 365, in _call_widget_constructed
Widget._widget_construction_callback(widget)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/shinywidgets/_shinywidgets.py", line 113, in init_shiny_widget
session.app._dependency_handler.mount(
AttributeError: 'NoneType' object has no attribute '_dependency_handler'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/Users/machow/.pyenv/versions/3.9.5/lib/python3.9/multiprocessing/process.py", line 315, in _bootstrap
self.run()
File "/Users/machow/.pyenv/versions/3.9.5/lib/python3.9/multiprocessing/process.py", line 108, in run
self._target(*self._args, **self._kwargs)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/uvicorn/_subprocess.py", line 80, in subprocess_started
target(sockets=sockets)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/uvicorn/server.py", line 65, in run
return asyncio.run(self.serve(sockets=sockets))
File "/Users/machow/.pyenv/versions/3.9.5/lib/python3.9/asyncio/runners.py", line 44, in run
return loop.run_until_complete(main)
File "/Users/machow/.pyenv/versions/3.9.5/lib/python3.9/asyncio/base_events.py", line 642, in run_until_complete
return future.result()
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/uvicorn/server.py", line 69, in serve
await self._serve(sockets)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/uvicorn/server.py", line 76, in _serve
config.load()
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/uvicorn/config.py", line 434, in load
self.loaded_app = import_from_string(self.app)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/uvicorn/importer.py", line 29, in import_from_string
instance = getattr(instance, attr_str)
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/shiny/express/app.py", line 13, in __getattr__
return wrap_express_app(Path(name))
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/shiny/express/_run.py", line 62, in wrap_express_app
app_module = importlib.import_module(package_name)
File "/Users/machow/.pyenv/versions/3.9.5/lib/python3.9/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/shiny/express/_run.py", line 102, in exec_module
module.app = create_express_app( # pyright: ignore[reportAttributeAccessIssue]
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/shiny/express/_run.py", line 132, in create_express_app
app_ui = run_express(file, package_name).tagify()
File "/Users/machow/.virtualenvs/reactable-py/lib/python3.9/site-packages/shiny/express/_run.py", line 255, in run_express
raise RuntimeError(e) from e
RuntimeError: 'NoneType' object has no attribute '_dependency_handler'
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