Python installs the virtual environment using Virtualenvwrapper

Mount in Https://www.jianshu.com/p/9f47a9801329Python use Virtualenvwrapper to install virtual environmentsTim_lee Attention 2017.05.04 22:30* words 363 Read 444 comments 0 likes 0

Recommendation: Do not install virtualenv, install Virtualenvwrapper directly

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

Configured ~/.zshrc to:

WORKON_HOME=$HOME/virtualenvssource /Library/Frameworks/Python.framework/Versions/2.7/bin/virtualenvwrapper.sh

1 Installing the Virtual Environment package

Installation

pip install virtualenvpip install virtualenvwrapper

Watercress Source Installation

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

2 configuring Virtualenvwrapper into environment variables

Find a path

sudo find / -name virtualenvwrapper.sh

Or

which virtualenvwrapper.sh

Get

/Library/Frameworks/Python.framework/Versions/2.7/bin/virtualenvwrapper.sh

If this is the case pip3 install :

/Library/Frameworks/Python.framework/Versions/3.5/bin/virtualenvwrapper.sh

Configuration

Write the virtualenvwrapper into the config file and add two words:

vim ~/.zshrcor vim ~/.bashrc :

The virtual environment of the package is placed in $HOME the user directory under the .virtualenvs hidden directory, it will create its own.

export WORKON_HOME=$HOME/.virtualenvs

The source is then configured with the Virtualenvs directory, which is found with which.

source /Library/Frameworks/Python.framework/Versions/3.5/bin/virtualenvwrapper.sh

But the configuration file I'm writing here is this complete two lines:

export WORKON_HOME=$HOME/virtualenvssource /Library/Frameworks/Python.framework/Versions/2.7/bin/virtualenvwrapper.sh

To create a python2 scrapy directory:

mkvirtualenv py2scrapy

Exit:

deactivate

View Virtual Environments

workon

Entering a virtual environment

workon py2scrapy

Deleting a virtual environment

Enter the directory where the Virtualenvwrapper stores the virtual environment first. This is configured in the .zshrc file.

cd .virtualenvs

Delete

rm -rf py2scrapy

To create a PYTHON3 virtual environment:

Find Python3 Installation Location first

which python3/Library/Frameworks/Python.framework/Versions/3.5/bin/python3

Create a virtual Environment from Python3 (called py3scrapy).

mkvirtualenv --python=/Library/Frameworks/Python.framework/Versions/3.5/bin/python3 py3scrapy

Or the most straightforward way to let the system find out for itself

mkvirtualenv newpy -p $(which python3)

3 for Virtualenv can not find the error resolution

This error occurs because the Virtualenv base dependency package is installed in the Mac's default Python directory and requires a soft connection ln -s .

not find virtualenv in your path

The first is find / -name "virtualenv" to find the location, the last line is virtualenv, you can see in the Frameworks directory, which is where the MAC comes with Python.

"virtualenv"find: /dev/fd/3: Not a directoryfind: /dev/fd/4: Not a directory/Library/Frameworks/Python.framework/Versions/2.7/bin/virtualenv

The last soft connection

$ sudo ln -s /Library/Frameworks/Python.framework/Versions/2.7/bin/virtualenv /usr/local/bin/virtualenv

Python installs the virtual environment using Virtualenvwrapper