ipython uses wrong python version with anaconda

Question

After activating my anaconda Python 3.6 environment with

source activate py36

if I type

python

I go into python 3.6, as expected. But if I type

ipython

I go into an ipython environment based python 3.5.5, which is the same python version I get using

source activate base

and then

python

How can I get into an ipython environment using my anaconda-supplied python 3.6 interpreter? I have updated my anaconda environment with

conda update anaconda

and

conda update conda

Doing so does not help.

EDIT:

I hadn't realized that I had to install ipython separately for the python 3.6 environment; I'd thought it was a default part of anaconda. So

conda install ipython

after

source activate py36

did the trick. It doesn't seem optimal that after activating a particular environment, ipython may bring up a completely different anaconda-based environment. I'd prefer it to simply cause a "command not found" error. Bringing up the wrong environment without making it very obvious that that is happening could lead to confusion or problems.

garyrob · Accepted Answer · 2018-06-06 01:15:09Z

5

I hadn't realized that I had to install ipython separately for the python 3.6 environment; I'd thought it was a default part of anaconda. So

conda install ipython

after

source activate py36

did the trick.

answered Jun 6, 2018 at 1:15

garyrob

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Druta Ruslan · Accepted Answer · 2018-06-05 19:53:29Z

2

Have you done hash -r since entering the conda environment? Bash can cache paths to executables, so sometimes it doesn't use the one reported by which. Running hash -r resets the cache

Maybe you need also to update ipython conda update ipython

answered Jun 5, 2018 at 19:53

Druta Ruslan

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1 Comment

garyrob Over a year ago

hash -r doesn't help, and when I do conda update ipython, it says "All requested packages already installed". I don't know if it's relevant, but I can't run conda update if I've activated my python 3.6 environment; I have to do "source activate base" before I can successfully run it. Otherwise I get the error "PackageNotInstalledError: Package is not installed in prefix."

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