解決Jupyter因卸載重裝導(dǎo)致的問題修復(fù)

更新時(shí)間：2020年04月10日 14:29:35 作者：堡壘-93

這篇文章主要介紹了解決Jupyter因卸載重裝導(dǎo)致的問題修復(fù)，具有很好的參考價(jià)值，希望對大家有所幫助。一起跟隨小編過來看看吧

因?yàn)橐恍┰?卸載了Anaconda2的版本,轉(zhuǎn)向3..發(fā)現(xiàn)Jupyter掛了.百思不得其解.后來了解到是因?yàn)閮?nèi)核找不到的問題導(dǎo)致的.這里整理了一下處理辦法

錯(cuò)誤內(nèi)容：

Traceback (most recent call last):
 File "c:\program files\python36\lib\site-packages\tornado\web.py", line 1543, in _execute
 result = yield result
 File "c:\program files\python36\lib\site-packages\tornado\gen.py", line 1099, in run
 value = future.result()
 File "c:\program files\python36\lib\site-packages\tornado\gen.py", line 1107, in run
 yielded = self.gen.throw(*exc_info)
 File "c:\program files\python36\lib\site-packages\notebook\services\sessions\handlers.py", line 73, in post
 type=mtype))
 File "c:\program files\python36\lib\site-packages\tornado\gen.py", line 1099, in run
 value = future.result()
 File "c:\program files\python36\lib\site-packages\tornado\gen.py", line 1107, in run
 yielded = self.gen.throw(*exc_info)
 File "c:\program files\python36\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:\program files\python36\lib\site-packages\tornado\gen.py", line 1099, in run
 value = future.result()
 File "c:\program files\python36\lib\site-packages\tornado\gen.py", line 1107, in run
 yielded = self.gen.throw(*exc_info)
 File "c:\program files\python36\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:\program files\python36\lib\site-packages\tornado\gen.py", line 1099, in run
 value = future.result()
 File "c:\program files\python36\lib\site-packages\tornado\gen.py", line 315, in wrapper
 yielded = next(result)
 File "c:\program files\python36\lib\site-packages\notebook\services\kernels\kernelmanager.py", line 148, in start_kernel
 super(MappingKernelManager, self).start_kernel(**kwargs)
 File "c:\program files\python36\lib\site-packages\jupyter_client\multikernelmanager.py", line 110, in start_kernel
 km.start_kernel(**kwargs)
 File "c:\program files\python36\lib\site-packages\jupyter_client\manager.py", line 259, in start_kernel
 **kw)
 File "c:\program files\python36\lib\site-packages\jupyter_client\manager.py", line 204, in _launch_kernel
 return launch_kernel(kernel_cmd, **kw)
 File "c:\program files\python36\lib\site-packages\jupyter_client\launcher.py", line 128, in launch_kernel
 proc = Popen(cmd, **kwargs)
 File "c:\program files\python36\lib\subprocess.py", line 709, in __init__
 restore_signals, start_new_session)
 File "c:\program files\python36\lib\subprocess.py", line 997, in _execute_child
 startupinfo)
FileNotFoundError: [WinError 2] 系統(tǒng)找不到指定的文件。

解決辦法

首先使用jupyter kernelspec list查看安裝的內(nèi)核和位置

2.進(jìn)入安裝內(nèi)核目錄打開kernel.jason文件，查看Python編譯器的路徑是否正確(其實(shí)筆者的問題就是因?yàn)槁窂讲徽_導(dǎo)致的),修改錯(cuò)誤的這個(gè)配置.

3.重啟jupyter notebook即可

網(wǎng)絡(luò)上一些其他解決辦法

1.首先使用jupyter kernelspec list查看安裝的內(nèi)核和位置

2.進(jìn)入安裝內(nèi)核目錄打開kernel.jason文件，查看Python編譯器的路徑是否正確

如果不正確python -m ipykernel install --user重新安裝內(nèi)核，如果有多個(gè)內(nèi)核，如果你使用conda create -n python2 python=2,為Python2.7設(shè)置conda變量,那么在anacoda下使用activate pyhton2切換python環(huán)境，重新使用python -m ipykernel install --user安裝內(nèi)核

3.重啟jupyter notebook即可

補(bǔ)充知識：關(guān)于jupyter內(nèi)核（kernel）錯(cuò)誤處理方法

首先明確起因：

卸載重裝，或者之前有裝過ipython，導(dǎo)致再次安裝后，內(nèi)核匹配的路徑錯(cuò)誤，沒有指向新安裝的位置。理論上有兩種處理方法：

方法一：

手動(dòng)修改路徑：

1.首先使用jupyter kernelspec list查看安裝的內(nèi)核和位置

3.重啟jupyter notebook即可

注：理論上沒有問題，但是我在實(shí)踐的時(shí)候沒有查找到這個(gè)文件，可能是版本問題，如果有經(jīng)驗(yàn)的話，這個(gè)方法比較快捷。

方法二：

暴力重裝：

暴力的意思就是徹底重裝，之前我有試過sudo pip3，sudo -H以及一些其他方法，但是沒有效果。