[Python知识库]python 虚拟环境

## mac

###? 1.安装virtualenv和virtualenvwrapper

pip3 install -i https://mirrors.aliyun.com/pypi/simple virtualenv
pip3 install -i https://mirrors.aliyun.com/pypi/simple virtualenvwrapper

注意：如果安装virtualenvwrapper 报错，一般执行：pip3 install --upgrade pip 即可

### 2.创建一个文件夹，用于存放虚拟环境? 例如：python_env

### 3.环境变量添加：vi ~/.bash_profile

export WORKON_HOME="/Users/yanghaoyang/python_envs"?

# which python 查看路径

export VIRTUALENVWRAPPER_PYTHON="/usr/local/bin/python3"?

# which?virtualenvwrapper.sh

source /Library/Frameworks/Python.framework/Versions/3.7/bin/virtualenvwrapper.sh

### 4. source??~/.bash_profile? 使之生效

### 5. 创建虚拟环境

mkvirtualenv env_test1

如果出现报错：ERROR: virtualenvwrapper could not find virtualenv in your path

解决方法：软链接 同样通过sudo find / -name 'virtualenv'可查找到路径

sudo ln -s /Library/Frameworks/Python.framework/Versions/3.7/bin/virtualenv /usr/local/bin/virtualenv

### 退出

deactivate

## windons

1 下载：

pip install -i https://pypi.douban.com/simple virtualenvwrapper-win

2.?环境变量里面配置

?3. 创建虚拟环境

mkvirtualenv -p /user/test/python.exe env_test1