Mac安装python-virtualenv与virtualenv使用

一、安装virtualenv

sudo pip install virtualenv

安装成功后终端输入：

virtualenv

(py3env)resume develop % 

You must provide a DEST_DIRUsage: virtualenv [OPTIONS] DEST_DIROptions:  --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=python2.5 will use the python2.5 interpreter                        to create the new environment.  The default is the                        interpreter that virtualenv was installed with                        (/usr/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.  --unzip-setuptools    Unzip Setuptools when installing it.  --relocatable         Make an EXISTING virtualenv environment relocatable.                        This fixes up scripts and makes all .pth files                        relative.  --no-setuptools       Do not install setuptools (or pip) in the new                        virtualenv.  --no-pip              Do not install pip in the new virtualenv.  --extra-search-dir=DIR                        Directory to look for setuptools/pip distributions in.                        This option can be used multiple times.  --never-download      DEPRECATED. Retained only for backward compatibility.                        This option has no effect. Virtualenv never downloads                        pip or setuptools.  --prompt=PROMPT       Provides an alternative prompt prefix for this

安装成功

二、安装python

sudo brew install python3

检测python是否安装成功

三、创建虚拟环境

virtualenv -p /usr/local/bin/python3 .virtualenv/py3env

virtualenv -p 安装python路径  虚拟环境存放路径

四、开启虚拟环境

source .virtualenv/py3env/bin/activate 

这时终端前方会有   (py3env) develop %  标志

五、若要关闭虚拟环境

终端输入：deactivate

此时终端前方py3env会消失