Install the virtual environment and environment configuration in ubuntu in python programming.

Install the virtual environment and environment configuration in ubuntu in python programming.

1. Upgrade python package management tool pip

Pip install -- upgrade pip Note: When you want to upgrade a package, 'pip install -- upgrade package name'

2. python Virtual Environment Installation

sudo apt-get install python-virtualenvsudo easy_install virtualenvwrapper

After the tool is installed, the mkvirtualenv command cannot be found. You need to execute the following environment variable settings.

1. Create a directory to store the virtual environment mkdir $ HOME/. virtualenvs2 ~ /. Add row in bashrc: export WORKON_HOME = $ HOME/. virtualenvs source/usr/local/bin/virtualenvwrapper. sh3. run: source ~ /. Bashrc

3. Create a python Virtual Environment

Mkvirtualenv [Virtual Environment name] workon [Virtual Environment name]

4. Exit the virtual environment and leave deactivate.

5. Delete (use with caution)
Rmvirtualenv [Virtual Environment name]

Python 2 Development

Create a virtual development environment for python2

Mkvirtualenv-p/usr/bin/python2.7 xwp_py2

(Because on ubuntu, I installed python2.7 in/usr/bin/. xwp_py2 is the name of my own virtual environment)

To use the python2.7 + django1.7.8 environment, you should install the following environment:

(Xwp_py2) itcast @ itcast :~ /Workspace/itcast_project $ pip freeze list // after entering a virtual environment, this command is used to view the installation configuration of the local environment. If these environments are not available, next, let's look at pip = 8.1.0Django = 1.7.8ipdb = 0.8.1ipython = 3.2.0Pillow = 2.8.2.

Store the package name to package_py2.txt. In your python virtual environment, run the following file: // package_py2.txt, which is used to execute the following command:

pip install -r package_py2.txt

Python 3 Development

Our courses are based on Python2.7, because many third-party libraries have not been overly developed into the python3 series.

Create a virtual development environment for python3

mkvirtualenv -p /usr/bin/python3.4 xwp_py3

To use the python3.4 + django1.9.4 environment, you should install the following environment:

(xwp_py3)itcast@itcast:~/workspace/itcast_project$ pip freeze listpip==8.1.0Django==1.9.4ipdb==0.8.1ipython==4.1.2Pillow==2.8.2

Store the package name to package_py3.txt. In your python virtual environment, run:

pip install -r package_py3.txt

Pip command quick query

• View installed packages

  Pip show -- files SomePackage

• Check which packages need to be updated

  Pip list -- outdated

• Upgrade package

  Pip install -- upgrade SomePackage

• Uninstall package

  Pip uninstall SomePackage

• Parameter description

  Pip -- help