Python3虚拟环境--venv

Python3.3以上的版本通过venv模块原生支持虚拟环境，可以代替之前的virtualenv。

该venv模块提供了创建轻量级“虚拟环境”，提供与系统Python的隔离支持。每一个虚拟环境都有其自己的Python二进制（允许有不同的Python版本创作环境），并且可以拥有自己独立的一套Python包。

注意：python3.3中使用”venv”命令创建的环境不包含”pip”，需进行手动安装。Python3.4中改进了这一缺陷。

创建虚拟环境

1 python -m venv myvenv

此命令会在当前目录下生成一个名为myvenv的目录，myenv也是创建的虚拟环境名。

激活环境：

/Scripts/activate.bat

退出环境：

/Scripts/deactivate.bat

附：

venv使用参数：

 1 usage: venv [-h] [--system-site-packages] [--symlinks] [--clear]
 2             [--upgrade] [--without-pip] ENV_DIR [ENV_DIR ...]
 3 
 4 Creates virtual Python environments in one or more target directories.
 5 
 6 positional arguments:
 7   ENV_DIR             A directory to create the environment in.
 8 
 9 optional arguments:
10   -h, --help             show this help message and exit
11   --system-site-packages Give access to the global site-packages dir to the
12                          virtual environment.
13   --symlinks             Try to use symlinks rather than copies, when symlinks
14                          are not the default for the platform.
15   --copies               Try to use copies rather than symlinks, even when
16                          symlinks are the default for the platform.
17   --clear                Delete the environment directory if it already exists.
18                          If not specified and the directory exists, an error is
19                          raised.
20   --upgrade              Upgrade the environment directory to use this version
21                          of Python, assuming Python has been upgraded in-place.
22   --without-pip          Skips installing or upgrading pip in the virtual
23                          environment (pip is bootstrapped by default)

注：转载需注明出处及作者。

流柯

创建虚拟环境

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