Python虛擬環境之pyenv-virtualenv插件

按照<< Python多版本環境管理之pyenv >>的操做安裝pyenv後.咱們能夠方便的在不一樣版本中切換了.若是隻開發一個項目的是沒問題,可是若是同時進行多個項目,不一樣項目又依懶同一個包的不一樣版本的話就比較尷尬了.因此還須要基於一樣的版本作不一樣的環境.

Linux下安裝完pyenv後會附帶安裝pyenv-virtualenv,Mac系統須要本身手動安裝一下

brew install pyenv-virtualenv

安裝後確認:

Linux:
ls ~/.pyenv/plugins
pyenv-doctor  pyenv-installer  pyenv-update  pyenv-virtualenv  pyenv-which-ext  python-build

Mac:
which pyenv-virtualenv
/usr/local/bin/pyenv-virtualenv

準備就緒,開工

1.建立虛擬環境

先確認一下本機的python版本
pyenv versions
* system (set by /root/.pyenv/version)
  3.7.3
  3.8.2
​
手動指定3.7.3版本 後面跟的虛擬環境的名字
pyenv virtualenv 3.7.3 project-a-3.7.3
Looking in links: /tmp/tmpuhxuv288
Requirement already satisfied: setuptools in /root/.pyenv/versions/3.7.3/envs/project-a-3.7.3/lib/python3.7/site-packages (40.8.0)
Requirement already satisfied: pip in /root/.pyenv/versions/3.7.3/envs/project-a-3.7.3/lib/python3.7/site-packages (19.0.3)

不指定版本,默認會使用當前環境版本.

建立時建議使用工程名+Python版本

2.查看虛擬環境

pyenv virtualenvs
  3.7.3/envs/project-a-3.7.3 (created from /root/.pyenv/versions/3.7.3)
  project-a-3.7.3 (created from /root/.pyenv/versions/3.7.3)

再建立一個project-b並查看

pyenv virtualenv 3.7.3 project-b-3.7.3

Looking in links: /tmp/tmpa9ctl5a1
Requirement already satisfied: setuptools in /root/.pyenv/versions/3.7.3/envs/project-b-3.7.3/lib/python3.7/site-packages (40.8.0)
Requirement already satisfied: pip in /root/.pyenv/versions/3.7.3/envs/project-b-3.7.3/lib/python3.7/site-packages (19.0.3)
pyenv virtualenvs
  3.7.3/envs/project-a-3.7.3 (created from /root/.pyenv/versions/3.7.3)
  3.7.3/envs/project-b-3.7.3 (created from /root/.pyenv/versions/3.7.3)
  project-a-3.7.3 (created from /root/.pyenv/versions/3.7.3)
  project-b-3.7.3 (created from /root/.pyenv/versions/3.7.3

好了,咱們如今有兩個項目的同一個版本了

3.激活虛擬環境

pyenv activate project-a-3.7.3
pyenv-virtualenv: prompt changing will be removed from future release. configure `export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior.

驗證當前版本
python -V
Python 3.7.3

4.退出虛擬環境

pyenv deactivate

再次驗證版本
python -V
Python 2.7.17

發現版本已切回系統版本

5.刪除虛擬環境

pyenv uninstall project-a-3.7.3
pyenv-virtualenv: remove /root/.pyenv/versions/3.7.3/envs/project-a-3.7.3? y

再次查看虛擬環境發現只有project-b了
pyenv virtualenvs
  3.7.3/envs/project-b-3.7.3 (created from /root/.pyenv/versions/3.7.3)
  project-b-3.7.3 (created from /root/.pyenv/versions/3.7.3)

that's all