Essayez d'utiliser virtualenv maintenant

pypy Je l'ai regardé, mais si vous y réfléchissez, vous pouvez changer python simplement en changeant les variables d'environnement. J'y ai pensé maintenant, alors je l'ai installé

Approprié dans l'ordre ou la proportion. En tant que condition préalable, XCode, HomeBrew et pip sont déjà installés.

Installez d'abord pypy

$ pip install pypy

Puis installez virtualenv

$ sudo pip install virtualenv
Password:
Downloading/unpacking virtualenv
  Downloading virtualenv-1.9.1.tar.gz (2.0MB): 2.0MB downloaded
  Running setup.py egg_info for package virtualenv

    warning: no previously-included files matching '*' found under directory 'docs/_templates'
    warning: no previously-included files matching '*' found under directory 'docs/_build'
Installing collected packages: virtualenv
  Running setup.py install for virtualenv

    warning: no previously-included files matching '*' found under directory 'docs/_templates'
    warning: no previously-included files matching '*' found under directory 'docs/_build'
    Installing virtualenv script to /usr/local/bin
    Installing virtualenv-2.7 script to /usr/local/bin
Successfully installed virtualenv
Cleaning up...

Après cela, collectez le Python existant et définissez l'environnement

$ virtualenv -p `which pypy` pypy
Running virtualenv with interpreter /usr/local/bin/pypy
New pypy executable in pypy/bin/pypy
Installing setuptools............done.
Installing pip...............done.

$ virtualenv -p `which python` python_2_7_1
Running virtualenv with interpreter /usr/bin/python2.7
New python executable in python_2_7_1/bin/python
Installing setuptools............done.
Installing pip...............done.

$ virtualenv -p `which python2.6` python_2_6_7
Running virtualenv with interpreter /usr/bin/python2.6
New python executable in python_2_6_7/bin/python2.6
Also creating executable in python_2_6_7/bin/python
Installing setuptools............................done.
Installing pip...............done.

Alors, changez le python à exécuter à la fin.

[yasui@yasui-MBA: ~][13:23] $ source ~/pypy/bin/activate
(pypy)[yasui@yasui-MBA: ~][13:23] $ python -V
Python 2.7.2 (341e1e3821ff, Jun 07 2012, 15:42:54)
[PyPy 1.9.0 with GCC 4.2.1]
(pypy)[yasui@yasui-MBA: ~][13:24] $

(pypy)[yasui@yasui-MBA: ~][13:24] $ source ~/python_2_7_1/bin/activate
(python_2_7_1)[yasui@yasui-MBA: ~][13:24] $ python -V
Python 2.7.1
(python_2_7_1)[yasui@yasui-MBA: ~][13:24] $

(python_2_7_1)[yasui@yasui-MBA: ~][13:24] $ source ~/python_2_6_7/bin/activate
(python_2_6_7)[yasui@yasui-MBA: ~][13:26] $ python -V
Python 2.6.7
(python_2_6_7)[yasui@yasui-MBA: ~][13:26] $