Details on multiple Python2 and Python3 versions.

Add detail regarding activating multiple Python2 and Python3 versions simultaneously.
This commit is contained in:
Nathan Henrie 2015-04-17 16:59:04 -06:00
parent 71c9ff565b
commit 17c153b1c1

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@ -126,9 +126,16 @@ reading it from the following sources, in this order:
Python. (In other words, whatever version would run if pyenv weren't in your Python. (In other words, whatever version would run if pyenv weren't in your
`PATH`.) `PATH`.)
**NOTE:** You can activate multiple versions at the same time, e.g. `pyenv **NOTE:** You can activate multiple versions at the same time, including mulitple
global 3.4.2 2.7.8`. This allows for parallel usage of python2 and python3, versions of Python2 or Python3 simultaneously. This allows for parallel usage of
and is required with tools like `tox`. Python2 and Python3, and is required with tools like `tox`. For example, to set
your path to first use your `system` Python and Python3 (set to 2.7.9 and 3.4.2
in this example), but also have Python 3.3.6, 3.2, and 2.5 available on your
`PATH`, one would first `pyenv install` the missing versions, then set `pyenv
global system 3.3.6 3.2 2.5`. At this point, one should be able to find the full
executable path to each of these using `pyenv which`, e.g. `pyenv which python2.5`
(should display `$PYENV_ROOT/versions/2.5/bin/python2.5`), or `pyenv which
python3.4` (should display path to system Python3).
### Locating the Python Installation ### Locating the Python Installation