Python3虚拟环境--venv

1 python -m venv myvenv

 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)