![pip basic commands
pip install [—-upgrade] <package>
Installs a Python package or upgrades it to the latest
available version.
!
Examples
pip install pymongo=1.2
pip install /some/dir/mypackage.tgz
pip install http://someserver/mypackage.zip
pip install git+ssh://myserver/myrepo.git@feature#egg=MyPackage
!
!
pip uninstall <package>
Deletes an already installed package](https://image.slidesharecdn.com/pipandvirtualenvshorter-140320100612-phpapp02/85/pip-and-virtualenv-8-320.jpg)
![pip basic commands
pip list [—-outdated]
Lists installed packages
!
!
pip search <string>
Searches for packages whose description contains the
specified string
> pip list --outdated
amqp (Current: 1.3.3 Latest: 1.4.4)
billiard (Current: 3.3.0.8 Latest: 3.3.0.16)
celery (Current: 3.1.5 Latest: 3.1.9)
…
Examples
> pip search cassandra
cqlengine - Cassandra CQL 3 Object Mapper for Python
CassandraLauncher - Command line utilities for launching Cassandra clusters in EC2
pycassa - Python client library for Apache Cassandra
…](https://image.slidesharecdn.com/pipandvirtualenvshorter-140320100612-phpapp02/85/pip-and-virtualenv-9-320.jpg)
![creating a virtual env
virtualenv [options] <dest_dir>
Create a new virtual environment at the specified
path. It will contain a copy of all system-wide
packages.
!
Useful options
—-no-site-packages
Create a new empty virtual environment.
—-python=<python path>
Use the specified Python executable.](https://image.slidesharecdn.com/pipandvirtualenvshorter-140320100612-phpapp02/85/pip-and-virtualenv-13-320.jpg)
pip and virtualenv
- 1. and now, for something completely different…
- 2. pip & virtualenv Alex Maneu ! @zouave @PyBcn 20/03/2014
- 3. what is this about? package management when you need something someone else has written
- 4. some examples SciPy lxml requests django pymongo
- 6. where to find them? PyPI pypi.python.org Python Package Index
- 7. pip Recommended tool for installing uninstalling upgrading packages from PyPI
- 8. pip basic commands pip install [—-upgrade] <package> Installs a Python package or upgrades it to the latest available version. ! Examples pip install pymongo=1.2 pip install /some/dir/mypackage.tgz pip install http://someserver/mypackage.zip pip install git+ssh://myserver/myrepo.git@feature#egg=MyPackage ! ! pip uninstall <package> Deletes an already installed package
- 9. pip basic commands pip list [—-outdated] Lists installed packages ! ! pip search <string> Searches for packages whose description contains the specified string > pip list --outdated amqp (Current: 1.3.3 Latest: 1.4.4) billiard (Current: 3.3.0.8 Latest: 3.3.0.16) celery (Current: 3.1.5 Latest: 3.1.9) … Examples > pip search cassandra cqlengine - Cassandra CQL 3 Object Mapper for Python CassandraLauncher - Command line utilities for launching Cassandra clusters in EC2 pycassa - Python client library for Apache Cassandra …
- 10. what happens if…? > pip install pymongo ! (…) error: could not create '/Library/Python/ 2.7/site-packages/bson': Permission denied
- 11. virtualenv Tool for creating Python environments i s o l a t e d
- 12. virtualenv v1 v2 v3 django lxml + site packages numpy=1.8.0 pymongo requests>=2.2.0 site packages pyOpenSSL, pip, numpy=1.6.2
- 13. creating a virtual env virtualenv [options] <dest_dir> Create a new virtual environment at the specified path. It will contain a copy of all system-wide packages. ! Useful options —-no-site-packages Create a new empty virtual environment. —-python=<python path> Use the specified Python executable.
- 14. switching to a virtual env > source <dir>/bin/activate (v1)> ! ! Exiting current virtualenv (v1)> deactivate >
- 15. cool stuff with pip + virtualenv ! pip freeze > requirements.txt Create a description file with the packages and versions installed under the current virtualenv. ! pip install -r requirements.txt Install all packages according to the specification in requirements.txt.
- 16. summary • Packages: code someone else has written (SciPy, Django, lxml, pymongo) • Find packages on PyPI: pypi.python.org • Install them using pip • Keep your environment clean by using virtualenv