关于linux中python能够import而jupyter notebook不能import问题

当linux系统中jupyter notebook和python的sys.path不同时，有的模块不能import,需要对应检查下两个的路径

python3的shell界面

$python3

>>> import sys

>>> sys.path

['', '/cnn/pyenv/.pyenv/versions/3.5.1/lib/python35.zip', '/cnn/pyenv/.pyenv/versions/3.5.1/lib/python3.5', '/cnn/pyenv/.pyenv/versions/3.5.1/lib/python3.5/plat-linux', '/cnn/pyenv/.pyenv/versions/3.5.1/lib/python3.5/lib-dynload', '/cnn/pyenv/.pyenv/versions/env3web/lib/python3.5/site-packages']

>>> 

jupyter notebook的界面

$jupyter notebook    #在浏览器打开连接端口

In [1]: import sys

        sys.path

Out[1]: 

['',

 '/usr/lib/python35.zip',

 '/usr/lib/python3.5',

 '/usr/lib/python3.5/plat-x86_64-linux-gnu',

 '/usr/lib/python3.5/lib-dynload',

 '/home/jordan/.local/lib/python3.5/site-packages',

 '/usr/lib/python3.5/site-packages',

 '/usr/local/lib/python3.5/dist-packages',

 '/usr/lib/python3/dist-packages',

 '/usr/local/lib/python3.5/dist-packages/IPython/extensions',

 '/home/jordan/.ipython']

可以看到jupyter缺少python3下的安装包路径:/cnn/pyenv/.pyenv/versions/env3web/lib/python3.5/site-packages

解决方法:

方法一、在jupyter notebook添加路径

In [2]:import sys

       sys.path.append('/cnn/pyenv/.pyenv/versions/3.5.1/envs/env3web/lib/python3.5/site-packages')

但是这种方法只能在当前界面使用，关掉jupyter notebook就不能再使用

方法二、修改配置文件

1.生成配置文件

$ ipython profile create    

$ ipython locate            #ipython路径

2.修改配置文件

cd /home/jordan/.ipython/profile_default

vi ipython_config.py

添加语句:c.InteractiveShellApp.exec_lines = ['import sys; sys.path.append("/cnn/pyenv/.pyenv/versions/env3web/lib/python3.5/site-packages")' ]

这时候再打开jupyter notebook，sys.path有刚才添加的路径就OK了

参考资料:  https://www.lucypark.kr/blog/2013/02/10/when-python-imports-and-ipython-does-not/