Error output
```pytb
# computing velocity graph (using 1/28 cores)
Traceback (most recent call last):
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/traitlets/traitlets.py", line 653, 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 "", line 1, in
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/scvelo/tools/velocity_graph.py", line 373, in velocity_graph
vgraph.compute_cosines(n_jobs=n_jobs, backend=backend)
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/scvelo/tools/velocity_graph.py", line 185, in compute_cosines
res = parallelize(
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/scvelo/core/_parallelize.py", line 120, in wrapper
pbar = None if tqdm is None else tqdm(total=col_len, unit=unit)
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/tqdm/notebook.py", line 243, in __init__
self.container = self.status_printer(self.fp, total, self.desc, self.ncols)
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/tqdm/notebook.py", line 120, in status_printer
pbar = IProgress(min=0, max=total)
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/ipywidgets/widgets/widget_float.py", line 26, in __init__
super().__init__(**kwargs)
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/ipywidgets/widgets/widget_description.py", line 35, in __init__
super().__init__(*args, **kwargs)
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/ipywidgets/widgets/widget.py", line 504, in __init__
self.open()
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/ipywidgets/widgets/widget.py", line 517, in open
state, buffer_paths, buffers = _remove_buffers(self.get_state())
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/ipywidgets/widgets/widget.py", line 615, in get_state
value = to_json(getattr(self, k), self)
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/traitlets/traitlets.py", line 700, in __get__
return self.get(obj, cls)
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/traitlets/traitlets.py", line 656, in get
default = obj.trait_defaults(self.name)
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/traitlets/traitlets.py", line 1868, in trait_defaults
return self._get_trait_default_generator(names[0])(self)
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/traitlets/traitlets.py", line 624, in default
return self.make_dynamic_default()
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/ipywidgets/widgets/trait_types.py", line 365, in make_dynamic_default
return self.klass(*(self.default_args or ()),
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/ipywidgets/widgets/widget_layout.py", line 86, in __init__
super().__init__(**kwargs)
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/ipywidgets/widgets/widget.py", line 504, in __init__
self.open()
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/ipywidgets/widgets/widget.py", line 535, in open
self.comm = create_comm(**args)
File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/comm/__init__.py", line 27, in _create_comm
raise NotImplementedError("Cannot ")
NotImplementedError: Cannot
```
Versions
```pytb
# scvelo==0.3.0 scanpy==1.9.1 anndata==0.8.0 loompy==3.0.7 numpy==1.23.5 scipy==1.10.0 matplotlib==3.6.3 sklearn==1.1.3 pandas==1.5.3
Numba: Attempted to fork from a non-main thread, the TBB library may be in an invalid state in the child process.
ERROR: XMLRPC request failed [code: -32500]
RuntimeError: PyPI no longer supports 'pip search' (or XML-RPC search). Please use https://pypi.org/search (via a browser) instead. See https://warehouse.pypa.io/api-reference/xml-rpc.html#deprecated-methods for more information.
```
...
Error output
```pytb # computing velocity graph (using 1/28 cores) Traceback (most recent call last): File "/data/home/hubaoyang_lab/miniconda3/envs/scvelo.py3.8/lib/python3.8/site-packages/traitlets/traitlets.py", line 653, 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 "Versions
```pytb # scvelo==0.3.0 scanpy==1.9.1 anndata==0.8.0 loompy==3.0.7 numpy==1.23.5 scipy==1.10.0 matplotlib==3.6.3 sklearn==1.1.3 pandas==1.5.3 Numba: Attempted to fork from a non-main thread, the TBB library may be in an invalid state in the child process. ERROR: XMLRPC request failed [code: -32500] RuntimeError: PyPI no longer supports 'pip search' (or XML-RPC search). Please use https://pypi.org/search (via a browser) instead. See https://warehouse.pypa.io/api-reference/xml-rpc.html#deprecated-methods for more information. ```