can't get virtualenv to work with anaconda3 v4.3 on mac

[jense...@gmail.com]

I installed virtualenvwrapper.  When I try to mkvirtualenv myvenv, or virtualenv myvenv, I get the following message:

toddjensen$ virtualenv myvenv

Using base prefix '/Users/toddjensen/anaconda'

New python executable in /Users/toddjensen/.virtualenvs/myvenv/bin/python

dyld: Library not loaded: @rpath/libpython3.6m.dylib

  Referenced from: /Users/toddjensen/.virtualenvs/myvenv/bin/python

  Reason: image not found

ERROR: The executable /Users/toddjensen/.virtualenvs/myvenv/bin/python is not functioning

ERROR: It thinks sys.prefix is '/Users/toddjensen/.virtualenvs' (should be '/Users/toddjensen/.virtualenvs/myvenv')

ERROR: virtualenv is not compatible with this system or executable

I tried uninstalling virtualenvwrapper, and still get the same messages.  Someone else reported the same issue on stackoverflow; he is also using anaconda3 with python3.6.  I'm a newbie but my sister is a developer and spent almost two hours trying to get to the bottom of this with me, I've put in maybe 20 hours trying to solve this.  Any suggestions?

[Ray Donnelly]

How did you install virtualenv?

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[Todd Jensen]

I didn’t install it manually.  My understanding is it comes bundled with Python 3.4+, so it was installed when I installed Anaconda.

I installed virtualenvwrapper using the command

pip install —user virtualenvwrapper

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[Ray Donnelly]

To the best of my knowledge, virtualenv does not come bundled with any Pythons.

When you pip installed virtualenvwrapper, pip will have installed virtualenv for you as it is a dependency. Unfortunately, that virtualenv is not compatible with Anaconda Python. Fortunately, the Anaconda Distribution has a virtualenv that is compatible. To fix this:

pip uninstall virtualenv

conda install virtualenv

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[Todd Jensen]

This solved the issue!  Ray, this thing has been killing me and I can’t thank you enough.

As a general rule for anaconda users, should we always try conda install _____ first, and only use pip as a backup?

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[Pete Jemian]

That's the way I do it.

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[Ray Donnelly]

Absolutely you should prefer conda. We create and maintain those ones and the conda package manager is able to err, manage them better. Glad you got it working.

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[djyan...@gmail.com]

Hi guys,

I think this is the help I might need too.... as I work with Anaconda and couldn't make virtualenwrapper  work.

But we running : conda install virtualenv

I get:

 PermissionError(13, 'Permission denied')

Does anybody knows why ??

Thanks

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[Ray Donnelly]

Please show the output of conda info please.

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[DJ YANiC]

Hi,

Here is a screenshot.

The first serie of exceptions correspond to the uninstallation process.

And then I try to install as you'll see...

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[Ray Donnelly]

Please copy and paste text instead of attaching a screenshot.

[DJ YANiC]

sorry:

ERROR conda.core.link:_execute_actions(337): An error occurred while installing package 'defaults::virtualenv-15.1.0-py36_0'.

PermissionError(13, 'Permission denied')

Attempting to roll back.

PermissionError(13, 'Permission denied')

- Websitehttp://dj-yanic.com

[Ray Donnelly]

Please paste the output from:

conda info

[DJ YANiC]

Is this good?

Yannicks-MBP:~ yannickleroux$ conda install virtualenv

Fetching package metadata ...........

Solving package specifications: .

Package plan for installation in environment /Users/yannickleroux/anaconda:

The following NEW packages will be INSTALLED:

    virtualenv: 15.1.0-py36_0

The following packages will be UPDATED:

    conda:      4.3.21-py36_0 --> 4.3.22-py36_0

Proceed ([y]/n)? y

ERROR conda.core.link:_execute_actions(337): An error occurred while installing package 'defaults::virtualenv-15.1.0-py36_0'.

PermissionError(13, 'Permission denied')

Attempting to roll back.

PermissionError(13, 'Permission denied')

Yannick.

http://dj-yanic.com

[DJ YANiC]

Is this good?

Yannicks-MBP:~ yannickleroux$ conda install virtualenv

Fetching package metadata ...........

Solving package specifications: .

Package plan for installation in environment /Users/yannickleroux/anaconda:

The following NEW packages will be INSTALLED:

    virtualenv: 15.1.0-py36_0

The following packages will be UPDATED:

    conda:      4.3.21-py36_0 --> 4.3.22-py36_0

Proceed ([y]/n)? y

ERROR conda.core.link:_execute_actions(337): An error occurred while installing package 'defaults::virtualenv-15.1.0-py36_0'.

PermissionError(13, 'Permission denied')

Attempting to roll back.

PermissionError(13, 'Permission denied')

Yannick.

http://dj-yanic.com

[Ray Donnelly]

No, I want the output from "conda info" not that from "conda install virtualenv"

[DJ YANiC]

sorry newbie :)

Current conda install:

               platform : osx-64

          conda version : 4.3.21

       conda is private : False

      conda-env version : 4.3.21

    conda-build version : not installed

         python version : 3.6.1.final.0

       requests version : 2.14.2

       root environment : /Users/yannickleroux/anaconda  (writable)

    default environment : /Users/yannickleroux/anaconda

       envs directories : /Users/yannickleroux/anaconda/envs

                          /Users/yannickleroux/.conda/envs

          package cache : /Users/yannickleroux/anaconda/pkgs

                          /Users/yannickleroux/.conda/pkgs

           channel URLs : https://conda.anaconda.org/anaconda-fusion/osx-64

                          https://conda.anaconda.org/anaconda-fusion/noarch

                          https://repo.continuum.io/pkgs/free/osx-64

                          https://repo.continuum.io/pkgs/free/noarch

                          https://repo.continuum.io/pkgs/r/osx-64

                          https://repo.continuum.io/pkgs/r/noarch

                          https://repo.continuum.io/pkgs/pro/osx-64

                          https://repo.continuum.io/pkgs/pro/noarch

            config file : /Users/yannickleroux/.condarc

             netrc file : None

           offline mode : False

             user-agent : conda/4.3.21 requests/2.14.2 CPython/3.6.1 Darwin/16.0.0 OSX/10.12    

                UID:GID : 501:20

[tla...@gmail.com]

Hi DJ YANiC,

same problem occur, have you settle yours?

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[DJ Yannick L gmail]

Hi

I just gave up trying to use virtual env as conda has already the build in possibility to manage virtual environments. I use this now: 

https://conda.io/docs/user-guide/tasks/manage-environments.html

Sent from my iPhone