Python virtualenv & pip in 90 minutes
Download as PPT, PDF6 likes4,294 views
The document discusses Python virtual environments (virtualenv) and the pip package manager. It introduces virtualenv and pip, explains why they are useful tools for isolating Python environments and managing packages, and provides exercises for creating virtual environments, using pip to install/uninstall packages, creating your own pip packages, and sharing packages on PyPI. The goal is to help users understand and learn to use these tools in 90 minutes.
![Exercise 3: Create your own package
Write a simple hello.py under hello folder
print “hello world”
Write a setup.py
from distutils.core import setup
setup(name=‘hello',
version=‘0.0.1',
py_modules=[‘hello'], )
Package and install
$ python setup.py sdist
$ pip install dist/hello.0.0.1.zip
$ find ~/venv | grep hello
Change version to “0.0.2” and do it again
Python Virtualenv & Pip in 90 minutes9
http://docs.python.org/2/distutils/introduction.html](https://image.slidesharecdn.com/pythonvirtualenvpipin90mins-130808024746-phpapp02/85/Python-virtualenv-pip-in-90-minutes-9-320.jpg)
![Exercise 4: make your scripts runnable
Make the hello.py can be runnable after installation
from distutils.core import
setup setup(name=‘hello',
version=‘0.0.3’,
scripts=[‘hello.py’],
py_modules=[‘hello'], )
Testing it
$ python setup.py sdist
$ pip install dist/hello.0.0.3.zip
$ find ~/venv | grep hello
Make it runnable (change hello.py ..)
$ hello.py # bingo, so simple
Python Virtualenv & Pip in 90 minutes10](https://image.slidesharecdn.com/pythonvirtualenvpipin90mins-130808024746-phpapp02/85/Python-virtualenv-pip-in-90-minutes-10-320.jpg)
Python virtualenv & pip in 90 minutes
- 2. Agenda Python Virtualenv & Pip in 90 minutes2 What isVirtualenv & Pip ? Environment : InstallVirtualenv on windows (Linux is easy) Exercise 1: Create own environment using virtualenv Exercise 2: Learn pip command Exercise 3: Create own Pip package Exercise 4: Make scripts runnable directly Bonus Exercise: Share your scripts outside !!!! Exercise are created by me, and some introduction slides are copied from http://www.slideshare.net/webdebs/virtualenv-12727213
- 3. Problem for using python How to install the packages ? (download & python setup.py install) How to use different python versions (2.6,2.7,3.x..)? How to install different packages (0.2,0.3.) How to test some packages without ruin the system How to delivery your python codes to other ? How to verify them ? … Python Virtualenv & Pip in 90 minutes3
- 4. What is Pip & PyPi & Virtualenv pip is a tool for installing and managing Python packages It’s a replacement for easy_install. PyPi (Python Pakage Index) is a repository of software for Python and currently count 33429 package https://pypi.python.org/pypi Virtualenv is a tool to isolate your python environment Python Virtualenv & Pip in 90 minutes4
- 5. Environment Python Virtualenv & Pip in 90 minutes5 Python 2.7.x In Windows with Git Bash http://www.python.org/ftp/python/2.7.3/python-2.7.3.msi (2.7.5 has issues with pycrypto) Add into Path Install Pip (Python package management) curl -O http://python-distribute.org/distribute_setup.py python distribute_setup.py easy_install pip InstallVirtualenv pip --version pip install virtualenv http://stackoverflow.com/questions/4750806/how-to-install-pip-on-windows
- 6. WHY virtual environments ? Isolation - Python packages and even version live in their own planet :) Permissions - No sudoers, the environment is mine!!! Organization - each project can maintain its own requirements file of Python packages. No-Globalization – don’t require installing stuff globally on the system. Python Virtualenv & Pip in 90 minutes6
- 7. Exercise 1: Create own environment Python Virtualenv & Pip in 90 minutes7 Create own environment $ pip list # if error, $ pip install --upgrade setuptools $ cd ~ $ virtualenv venv $ find venv $ . venv/Scripts/activate $ pip list $ pip install python-jenkins xunitparser $ pip list $ find ~/venv | grep unit $ deactivate $ pip list
- 8. Exercise 2: learn pip Install , uninstall, upgrade packages $ . ~/venv/Scripts/activate $ pip install junit-xml # latest version $ pip uninstall junit-xml $ pip install junit-xml==1.2 # specific version $ pip install --upgrade junit-xml Generate package list and restore $ pip list $ pip freeze > requirements.txt $ pip uninstall junit-xml xunitparser $ pip install -r requirements.txt Install local packages from mirror $ pip install --index-url http://my.package.repo/simple/ <yourpackage> Python Virtualenv & Pip in 90 minutes8 http://www.pip-installer.org/en/latest/usage.html
- 9. Exercise 3: Create your own package Write a simple hello.py under hello folder print “hello world” Write a setup.py from distutils.core import setup setup(name=‘hello', version=‘0.0.1', py_modules=[‘hello'], ) Package and install $ python setup.py sdist $ pip install dist/hello.0.0.1.zip $ find ~/venv | grep hello Change version to “0.0.2” and do it again Python Virtualenv & Pip in 90 minutes9 http://docs.python.org/2/distutils/introduction.html
- 10. Exercise 4: make your scripts runnable Make the hello.py can be runnable after installation from distutils.core import setup setup(name=‘hello', version=‘0.0.3’, scripts=[‘hello.py’], py_modules=[‘hello'], ) Testing it $ python setup.py sdist $ pip install dist/hello.0.0.3.zip $ find ~/venv | grep hello Make it runnable (change hello.py ..) $ hello.py # bingo, so simple Python Virtualenv & Pip in 90 minutes10
- 11. Bonus: Share your scripts outside https://pypi.python.org/pypi register and $ python setup.py register sdist upload # that’s all Simpler than your thinking …. Python Virtualenv & Pip in 90 minutes11
- 12. Summary Using virtualenv to isolate your python environment Use pip to package Host in github and shared in PyPi repository Enjoy python programming Python Virtualenv & Pip in 90 minutes12
- 13. Reference Slides http://www.slideshare.net/webdebs/virtualenv-12727213 Usage link http://www.pip-installer.org/en/latest/usage.html https://pypi.python.org/pypi http://docs.python.org/2/distutils/introduction.html https://pypi.python.org/pypi/virtualenv Python Virtualenv & Pip in 90 minutes13