安装 xbpch 后出现 Jupyter 内核错误答案

【问题标题】：Jupyter kernel error after installing xbpch安装 xbpch 后出现 Jupyter 内核错误
【发布时间】：2018-10-24 21:06:26
【问题描述】：

我是 python 和 jupyter notebook 的新用户。最近我在 anaconda 提示符下安装了 xbpch(https://xbpch.readthedocs.io/en/latest/index.html) 包，使用： conda install -c conda-forge xbpch 之后，每次我打开 jupyter notebook 时，都会出现带有此回溯消息的内核错误：

Traceback (most recent call last):
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\web.py", line 1592, in _execute
    result = yield result
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1133, in run
    value = future.result()
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1141, in run
    yielded = self.gen.throw(*exc_info)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\notebook\services\sessions\handlers.py", line 73, in post
    type=mtype))
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1133, in run
    value = future.result()
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1141, in run
    yielded = self.gen.throw(*exc_info)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 79, in create_session
    kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1133, in run
    value = future.result()
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1141, in run
    yielded = self.gen.throw(*exc_info)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 92, in start_kernel_for_session
    self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 1133, in run
    value = future.result()
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\tornado\gen.py", line 326, in wrapper
    yielded = next(result)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\notebook\services\kernels\kernelmanager.py", line 160, in start_kernel
    super(MappingKernelManager, self).start_kernel(**kwargs)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\jupyter_client\multikernelmanager.py", line 110, in start_kernel
    km.start_kernel(**kwargs)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\jupyter_client\manager.py", line 259, in start_kernel
    **kw)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\jupyter_client\manager.py", line 204, in _launch_kernel
    return launch_kernel(kernel_cmd, **kw)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\site-packages\jupyter_client\launcher.py", line 128, in launch_kernel
    proc = Popen(cmd, **kwargs)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\subprocess.py", line 709, in __init__
    restore_signals, start_new_session)
  File "C:\Users\Anaconda3\envs\snowflakes\lib\subprocess.py", line 997, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified

有谁知道如何解决这个问题？

【问题讨论】：

只是一个疯狂的猜测：conda-forge 目前正在将软件包迁移到新的编译器基础架构，但 xbpch 尚未迁移。也许安装 xbpch 强制 conda 确实会引入现在不兼容的软件包。我会尝试重新安装 jupyter 和 jupyter-notebook 看看是否有帮助。

标签： python python-3.x anaconda jupyter-notebook

【解决方案1】：

转到您的 Jupyter 目录（例如C:\Users\Admin\AppData\Roaming\jupyter\kernels\python3）然后复制kernel.json（例如kernel_old.json），然后用记事本或JS IDE打开。应该是这样的： { "argv": [ "C:\Users\Admin\AppData\Local\Programs\python\python37\python.exe", "-m", "ipykernel_launcher", "-f", "{connection_file}" ], "display_name": "Python 3", "language": "python" } 在你的情况下用你的 Anaconda3 python 改变路径：C:\Users\Anaconda3\python.exe 然后再次启动 jupyter。

【讨论】：