Virtualenv

[lif3ng]

help

Usage: virtualenv [OPTIONS] DEST_DIR

Options:
  --version             show program's version number and exit
  -h, --help            show this help message and exit
  -v, --verbose         Increase verbosity.
  -q, --quiet           Decrease verbosity.
  -p PYTHON_EXE, --python=PYTHON_EXE
                        The Python interpreter to use, e.g.,
                        --python=python3.5 will use the python3.5 interpreter
                        to create the new environment.  The default is the
                        interpreter that virtualenv was installed with
                        (/Users/lifeng/anaconda3/bin/python)
  --clear               Clear out the non-root install and start from scratch.
  --no-site-packages    DEPRECATED. Retained only for backward compatibility.
                        Not having access to global site-packages is now the
                        default behavior.
  --system-site-packages
                        Give the virtual environment access to the global
                        site-packages.
  --always-copy         Always copy files rather than symlinking.
  --relocatable         Make an EXISTING virtualenv environment relocatable.
                        This fixes up scripts and makes all .pth files
                        relative.
  --no-setuptools       Do not install setuptools in the new virtualenv.
  --no-pip              Do not install pip in the new virtualenv.
  --no-wheel            Do not install wheel in the new virtualenv.
  --extra-search-dir=DIR
                        Directory to look for setuptools/pip distributions in.
                        This option can be used multiple times.
  --download            Download pre-installed packages from PyPI.
  --no-download, --never-download
                        Do not download pre-installed packages from PyPI.
  --prompt=PROMPT       Provides an alternative prompt prefix for this
                        environment.
  --setuptools          DEPRECATED. Retained only for backward compatibility.
                        This option has no effect.
  --distribute          DEPRECATED. Retained only for backward compatibility.
                        This option has no effect.
  --unzip-setuptools    DEPRECATED.  Retained only for backward compatibility.
                        This option has no effect.

python version

  -p PYTHON_EXE, --python=PYTHON_EXE
                        The Python interpreter to use, e.g.,
                        --python=python3.5 will use the python3.5 interpreter
                        to create the new environment.  The default is the
                        interpreter that virtualenv was installed with
                        (/Users/lifeng/anaconda3/bin/python)

如果不指定python版本，默认会拷贝命令行输入python所定位到的可执行解释器。 指定版本可使用 virtualenv -p python2.7 envdir

activate

source envdir/bin/activate

deactivate

deactivate