模塊 library 選項 min 效果 .json file note port

在虛擬環境tf中安裝完tensorflow後，在虛擬環境tf打開的jupyter裏發現只有一個kernel-python3，新建一個文件， import tensorflow as tf ，發現報錯，沒有tf這個模塊。
一開始還以為是tf的問題安裝失敗，後來才意識到是jupyter的問題。因為在虛擬環境tf中，雖然有jupyter(或者自己再安裝pip install jupyter，他會提示說已存在)，但這個jupyter還是原python環境中的jupyter。在虛擬環境tf中用命令 (tf) treamy ~ $ which jupyter 得/usr/local/bin/jupyter 再用 (tf) treamy ~ $ find

~/code/pydir/env -name "jupyter*" 發現虛擬環境中無jupyter。故虛擬環境中的jupyter還是原python環境中的jupyter，kernel為python3，而我的原python3並沒有安裝tensorflow，所以報錯了。

之前查網上按這個方法解決：（但無效）

(tf) treamy ~ $ ipython kernelspec install-self --user

[TerminalIPythonApp] WARNING | Subcommand `ipython kernelspec` is deprecated and will be removed in future versions. [TerminalIPythonApp] WARNING | You likely want to use `jupyter kernelspec` in the future [InstallNativeKernelSpec] WARNING | `jupyter kernelspec install-self` is DEPRECATED as of 4.0. You probably want `ipython kernel install` to install the IPython kernelspec. [InstallNativeKernelSpec] Installed kernelspec python3 in /Users/treamy/Library/Jupyter/kernels/python3

(tf) treamy ~ $ mkdir
 
 -p ~/.ipython/kernels
(tf) treamy ~ $ mv /Users/treamy/Library/Jupyter/kernels/python3 ~/.ipython/kernels/tfkernel

打開kernel.json文件，然後將display_name 後面的內容修改為tfkernel

(tf) treamy ~ $ vim ~/.ipython/kernels/tfkernel/kernel.json

但這樣並無效果，因為創建的kernel相當於只是原kernel的復制品即python3，從上面那個json文件就可以看出來。

解決方案：

(tf) treamy ~ $ python3 -m ipykernel install
 
 --user --name tf --display-name "Python3(tf)"

# Installed kernelspec tf in /Users/treamy/Library/Jupyter/kernels/tf cd 到 /Users/treamy/Library/Jupyter/kernels/tf 裏面含 kernel.json logo-32x32.png logo-64x64.png 查看這個json文件： cat kernel.json { "argv": [ "/Users/treamy/code/pydir/env/tf/bin/python3", "-m", "ipykernel_launcher", "-f", "{connection_file}" ], "display_name": "Python3(tf)", "language": "python" } 然後也不用移動它，就這樣就OK了。刷新jupyter後就可以看到Python3(tf)這個選項。

詳細官方文檔：

https://github.com/ipython/ipython/blob/7c12b021ee7bdcaf8cec814a624203d8e74aab08/docs/source/install/kernel_install.rst#kernels-for-different-environments

在Jupyter notebook中使用特定虛擬環境中的python的kernel