Question

我无法在新安装的 python 环境中启动我的笔记本。内核无法开始给我这个错误：

ECM_WF_PROC_ETAPAS.ROWID

我在使用 python 3.8.5 的 Ubuntu 20.04。我只使用 pip (20.3.3) 安装了“notebook”，但在打开新笔记本时出现此错误。

这是我的包裹清单：

Traceback (most recent call last):
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/tornado/web.py", line 1704, in _execute
    result = await result
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/tornado/gen.py", line 769, in run
    yielded = self.gen.throw(*exc_info)  # type: ignore
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/notebook/services/sessions/handlers.py", line 69, in post
    model = yield maybe_future(
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/tornado/gen.py", line 762, in run
    value = future.result()
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/tornado/gen.py", line 769, in run
    yielded = self.gen.throw(*exc_info)  # type: ignore
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/notebook/services/sessions/sessionmanager.py", line 88, in create_session
    kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/tornado/gen.py", line 762, in run
    value = future.result()
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/tornado/gen.py", line 769, in run
    yielded = self.gen.throw(*exc_info)  # type: ignore
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/notebook/services/sessions/sessionmanager.py", line 100, in start_kernel_for_session
    kernel_id = yield maybe_future(
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/tornado/gen.py", line 762, in run
    value = future.result()
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/notebook/services/kernels/kernelmanager.py", line 176, in start_kernel
    kernel_id = await maybe_future(self.pinned_superclass.start_kernel(self, **kwargs))
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/jupyter_client/multikernelmanager.py", line 184, in start_kernel
    km, kernel_name, kernel_id = self.pre_start_kernel(kernel_name, kwargs)
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/jupyter_client/multikernelmanager.py", line 169, in pre_start_kernel
    km = self.kernel_manager_factory(connection_file=os.path.join(
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/jupyter_client/multikernelmanager.py", line 83, in create_kernel_manager
    km = kernel_manager_ctor(*args, **kwargs)
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/traitlets/config/configurable.py", line 82, in __init__
    super(Configurable, self).__init__(**kwargs)
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/traitlets/traitlets.py", line 1080, in __init__
    super_kwargs[key] = value
  File "/usr/lib/python3.8/contextlib.py", line 120, in __exit__
    next(self.gen)
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/traitlets/traitlets.py", line 1214, in hold_trait_notifications
    self.notify_change(change)
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/traitlets/traitlets.py", line 1227, in notify_change
    return self._notify_observers(change)
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/traitlets/traitlets.py", line 1264, in _notify_observers
    c(event)
  File "/home/doctoq/Desktop/Dev/Policy-Gradient/venv/lib/python3.8/site-packages/traitlets/traitlets.py", line 888, in compatible_observer
    return func(self, change)
TypeError: _kernel_spec_manager_changed() takes 1 positional argument but 2 were given

我在任何地方都找不到这个问题。我尝试安装旧版本的“notebook”和“traitlets”，但我遇到了同样的问题。

有人有想法吗？谢谢！

Answer 1

我为我的主要 python 安装了 notebook（不在虚拟环境中），并发现问题仅在我从我的虚拟环境中使用 python 启动 notebook 时发生。

所以我按照此链接中的说明进行操作：https://janakiev.com/blog/jupyter-virtual-envs/

在我的虚拟环境中，我只运行了 pip install ipykernel，现在它可以工作了。

奇怪的是，现在我可以在其他虚拟环境中运行笔记本，而无需在其中安装 ipykernel。我想在我的第一个虚拟环境中安装 ipykernel 改变了我的主要笔记本安装中的一些东西，现在它适用于所有人。也许有人能比我更好地解释它。

不管怎样，我的问题解决了！

无法启动 ipython 内核 Python 3.8.5

1 个答案: