Anaconda/MacOS: Change default python version
anaconda, macos, python
Solution
Alright, I found a similar problem in the Continuum mailing list.
This was solved by re-installing python through conda
$ conda install python=2.7
Fetching package metadata: ..
Solving package specifications: .
Package plan for installation in environment /Users/kadu/anaconda:
The following packages will be downloaded:
package | build
---------------------------|-----------------
conda-3.5.2 | py27_0 135 KB
pycosat-0.6.1 | py27_0 57 KB
python-2.7.6 | 2 16.5 MB
pyyaml-3.11 | py27_0 149 KB
requests-2.3.0 | py27_0 564 KB
------------------------------------------------------------
Total: 17.4 MB
The following packages will be UN-linked:
package | build
---------------------------|-----------------
conda-3.5.2 | py34_0
pycosat-0.6.1 | py34_0
python-3.4.1 | 0
pyyaml-3.11 | py34_0
requests-2.3.0 | py34_0
The following packages will be linked:
package | build
---------------------------|-----------------
conda-3.5.2 | py27_0 hard-link
pycosat-0.6.1 | py27_0 hard-link
python-2.7.6 | 2 hard-link
pyyaml-3.11 | py27_0 hard-link
requests-2.3.0 | py27_0 hard-link
Proceed ([y]/n)?
This can also be used to change which is the default package under anaconda environments:
$ conda install python=3.4
Fetching package metadata: ..
Solving package specifications: .
Package plan for installation in environment /Users/kadu/anaconda:
The following packages will be UN-linked:
package | build
---------------------------|-----------------
conda-3.5.2 | py27_0
pycosat-0.6.1 | py27_0
python-2.7.6 | 2
pyyaml-3.11 | py27_0
requests-2.3.0 | py27_0
The following packages will be linked:
package | build
---------------------------|-----------------
conda-3.5.2 | py34_0 hard-link
pycosat-0.6.1 | py34_0 hard-link
python-3.4.1 | 0 hard-link
pyyaml-3.11 | py34_0 hard-link
requests-2.3.0 | py34_0 hard-link
Proceed ([y]/n)?
However, this would require manually changing the builds to any other packages you use. I had to reinstall spyder, which seems to have caused the bug in the first place and was presumably reinstalled when I tried to launch it under the wrong version. All the other libraries, which I didn't try to reinstall, are still working fine under 2.7.
Problem
I was using python with anaconda on osx 10.8 when spyder crashed. When I tried to restart it, the launcher showed it as uninstalled. I figured there might be something wrong with anaconda, so I restarted my computer, but the problem persisted. Looking into it, I noticed the default version of python had been changed: ``` $ python --version Python 3.4.1 :: Continuum Analytics, Inc. ``` I tried changing it back by using Apple's `defaults write`, relinking python with `ln -sf`, simply setting an `alias python=python2.7`, to no effect. Then I tried removing python3 with conda, but `conda remove python3` won't do the trick. Searching for packages produces this: ``` $ conda search python Fetching package metadata: .. (...) python 1.0.1 0 defaults (...) . 2.7.5 2 defaults . 2.7.5 3 defaults (...) * 3.4.1 0 defaults ``` I also looked up Continuum docs, and they recommend leaving 2.7 as standard and using an Anaconda environment if I want to use a different version, which doesn't help me. Does anybody have any idea of how to change default version back to 2.7? (Specs are: anaconda 1.7.0, osx 10.8.5, conda 3.5.2)