Build a Python virtual environment that anyone can understand September 2016 (pyenv + virutalenv)

Introduction

This post is based on the assumption that Python + pyenv + virutalenv is installed. If you haven't installed the above, please refer to the post below.

Anyone can understand how to build a Python environment on Mac September 2016 (pyenv + virutalenv + IPython notebook) http://qiita.com/tomoyaito16/items/f26fcc63652741a48562

Purpose of building a virtual environment

Python, which is included as standard in the OS, is provided for the libraries and applications included in the OS. Therefore, if you use it for free programming, you run the risk of problems with the apps and libraries it depends on. To avoid the above, it is better to create a virtual environment when programming.

To do

The environment is Mac OSX 10.10.5, and it is assumed that Xcode and homebrew are installed.

Build a virtual environment with virutalenv
Create a directory on the virtual environment with pyenv

Execution procedure

First check the environment path

First, check if the path is in Python under pyenv.

$ pyenv which python
$ pyenv which pip

It is OK if you can execute the above command and confirm that Python and pip are under .pyenv.

On the contrary, make sure that it is not under / usr / bin / python.

Build a virtual environment with virtualenv

Execute by specifying the Python version and virtual environment name.

Python version [3.5.2] and virtual environment name [test_3.5.2].
You can execute the following commands anywhere.

$ pyenv virtualenv 3.5.2 test_3.5.2

Link virtual environment and directory with pyenv

First, create a directory on virtualenv. You can create the directory anywhere.

[Test_project] has been created under Documents.

$ mkdir ~/Documents/test_project

Navigate to the directory you created.

$ cd ~/Documents/test_project

Associate the virtual environment of virtualenv with the directory.

$ pyenv local test_3.5.2

Supplement

The virtual environment built with virtualenv can be deleted below.

$ pyenv uninstall test_3.5.2

in conclusion

If you have any questions or mistakes, please comment. I hope that what my friends have taught me will help more people.

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