解决jupyter notebook import error但是命令提示符import正常的问题

Z时代
2024-01-10
分类：综合

基本上是因为jupyter notebook" title="jupyter notebook">jupyter notebook的kernel所用的python和命令提示符中的python环境不一样。

首先分别在cmd和jupyter notebook下查看所用python版本：

import sys
sys.executable

如果不一样的话就进行下一步，更改jupyter notebook的kernel环境：

在命令行输入：

ipython kernelspec list

可以看到指定kernel地址的文件夹：

Available kernels:
python2 C:\Users\adrianna\AppData\Roaming\jupyter\kernels\python2
python3 C:\Users\adrianna\AppData\Roaming\jupyter\kernels\python3

打开kernel.json 文件，将其中的python地址换成cmd中的python地址。


{
 "display_name": "Python 2", 
 "language": "python", 
 "argv": [
 "D:\\Anaconda2\\python.exe", 
 "-m", 
 "ipykernel", 
 "-f", 
 "{connection_file}"
 ]
}

补充知识：jupyter 安装后无法在mac terminal启动

系统：macOS Catalina

用pip3安装了jupyter

$ pip3 install jupyterlab

但是，但在terminal中输入

$ jupyter notebook

提示无法找到命令。

这是怎么回事呢？？？

系统环境变量的问题，也就是没有添加jupyter所在目录到系统环境中。

这里我只讲下我是如何快速解决的。

首先：找jupyter安装在哪

打开terminal，输入python3回车

$ python3
Python 3.7.2 (v3.7.2:9a3ffc0492, Dec 24 2018, 02:44:43)
[Clang 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.

导入sysmodule

>>> import sys

打印sys.path

>>> print(sys.path)

输出结果如下：

['', '/Library/Frameworks/Python.framework/Versions/3.7/lib/python37.zip', '/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7', '/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload', '/Users/mac/Library/Python/3.7/lib/python/site-packages', '/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages', '/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/setuptools-40.8.0-py3.7.egg', '/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg', '/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/incremental-17.5.0-py3.7.egg', '/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/Twisted-18.9.0-py3.7-macosx-10.9-x86_64.egg']

jupyter就安装在这个目录：/Library/Frameworks/Python.framework/Versions/3.7/bin/jupyter

创建个软链接到/usr/local/bin/