Change kernel to another version of python instead of system Python in Mac OSX

Question

I've already installed a Python via HomeBrew as you can see below:

J-MBP:runtime my$ ll `which python`
lrwxr-xr-x  1 my  admin  34 Mar 31 14:20 /usr/local/bin/python -> ../Cellar/python/2.7.11/bin/python
J-MBP:runtime my$ python
Python 2.7.11 (default, Jan 22 2016, 08:29:18)
[GCC 4.2.1 Compatible Apple LLVM 7.0.2 (clang-700.1.81)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.version
'2.7.11 (default, Jan 22 2016, 08:29:18) \n[GCC 4.2.1 Compatible Apple LLVM 7.0.2 (clang-700.1.81)]'

However, when I run jupyter notebook and double-check on the python version, it still use the old version pre-installed on the system.

import sys
sys.version

Out[3]:  '2.7.10 (default, Oct 23 2015, 18:05:06) \n[GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)]'

I'm wondering how to change the python to the newly-installed one in Jupyter Notebook.

Answer 1

ipython kernel install , check current kernel path. cd to it and then vim kernel.json .

{
 "display_name": "Python 2",
 "language": "python",
 "argv": [
  "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/bin/python2.7",
  "-m",
  "ipykernel",
  "-f",
  "{connection_file}"
 ]
}

Change argv argument to the newly-installed python path will solve the problem.

Answer 2

you can type which jupiter and edit the file. I guess that the previous version that was installed from homebrew is hardcoded in that file's shebang line to the path that which python returns