Django Dev Environment Howto
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This document provides guidance on setting up a development environment for Python and Django projects. It discusses choosing PostgreSQL as the database, installing Python packages and dependencies using pip, virtualenv and virtualenvwrapper, ensuring the necessary C compilers are installed to build extensions, and options for installing pre-built binaries when a C compiler is not desired. Potential issues around version mismatches, architectures, and security are also addressed.
Django Dev Environment Howto
- 1. Dev Environment How-To 29 Oct. 2013, Django Workshop @ CLBC
- 3. Me •TP (@uranusjr) • http://uranusjr.logdown.com/pages/about •RTFD •Had a crash with Futura recently
- 4. The (Most) Comprehensive Guide to Setting up a Development Environment for Django Projects
- 5. The (Most) Comprehensive Guide to Setting up a Development Environment for Python Projects
- 6. Django A Web Framework That Does Not Require a Mac
- 7. Topics • Choose your database (carefully) • Yes, when you develop • Construct a perfect Python dev machine • Linux • OS X
- 8. Topics • Choose your database (carefully) • Yes, when you develop • Construct a perfect Python dev machine • Linux • OS X • Windows
- 9. Topics • Choose your database (carefully) • Yes, when you develop • Construct a perfect Python dev machine • Other things
- 10. Database
- 12. Why? • Free as in Freedom • Recommended by dentists core developers • Data migration
- 13. Why? • Free as in Freedom • Recommended by core developers • Data migration
- 14. Matching Engines • Different engines behave differently • Fixtures are not for data migration
- 15. Engine Behaviour • A true story • Handling long strings • Type safety (if you use something raw) • Bugs on production machine are hard to find
- 16. Data Migration • Fixtures do not represent your data completely • They are just JSON, after all • You can't rollback loaddata • ContentTypes
- 17. SQLite Is (Still) Useful • Easy to wipe everything and start over • Quick 'n' dirty tests • Early stages during development
- 18. But... • MySQL is okay • Even Oracle is okay if you don't care • MariaDB • Just use it
- 19. Python Packages
- 20. What Version of Python Should I Use?
- 21. Python • Anything over 2.7.0 should be enough • YUM is still based on 2.6... Oops. • Python 3 is coming…or not • Having both Python 2 and 3 installed on Windows can be a nightmare
- 22. Setuptools and PIP • https://bitbucket.org/pypa/setuptools/raw/ bootstrap/ez_setup.py • python ez_setup.py • Modify PATH environment variable if needed • easy_install pip
- 23. Virtualenv • pip install virtualenv • virtualenvwrapper • pip install virtualenvwrapper • pip install virtualenvwrapper-win • pip install virtualenvwrapper-powershell
- 24. WUT? • setuptools = Python's package manager • Ever heard of distribute? • pip = Better easy_install alternative • virtualenv = Prevent Python lib pollution • virtualenvwrapper = Better virtualenv UI • Windows variants • Didi I hear somebody say APT?
- 25. virtualenvwrapper • WORKON_HOME • Load the commands (if needed) • Commands • mkvirtualenv • workon • Read the docs
- 26. Django and Friends • Always install packages inside virtualenv with pip • pip install django • pip install -r <requirement_file> • pip freeze
- 27. This is not enough.
- 28. Python Has Limits • Database connector • Image processing • Other heavy-lifting tasks
- 29. PostgreSQL Libs (in C) • OS X • Installer or Homebrew • Linux • Your favourite package manager • Windows • Installer
- 34. Build a C Extension • Get a C compiler • Install (or compile) library to bind with • Install CPython headers • apt-get install python-dev • pip install <binding_package>
- 35. Build a C Extension • Get THE ONE TRUE C compiler • Install (or compile) library to bind with • Install CPython headers • apt-get install python-dev • pip install <binding_package>
- 36. Get a Compiler • apt-get install build-essential • OK, I got lazy :p • Install Xcode and its "console tools" • Install Visual Studio (Express) • The "for Windows Desktop" version • Use the correct prompt
- 41. If you have VS2012 and Python 2.7, for example set VS90COMNTOOLS=%VS110COMNTOOLS%
- 44. I No Want C Compiler! • Pre-compiled binaries from the package manager • Pre-compiled binaries from the Web
- 45. Words of Warning • Version mismatch • CPU Architecture mismatch (Windows sucks) • Security issue • Why pip doesn't offer binary installing
- 46. From APT • apt-get install python-psycopg2 • What does it install? • http://packages.debian.org • .deb file is merely an ar archive • ln -s everything into $ENV/lib/site-packages
- 47. Pre-Built Installer • http://www.lfd.uci.edu/~gohlke/pythonlibs/ • Simply a compressed archive (usually gzip) • Viewable with 7-Zip or similar • easy_install <installer_path> • Use where to make sure
- 48. Miscellaneous • http://rudix.org has pre-built packages for OS X • I never used it, to be honest :p • RPM packages can be converted with rpm2cpio and then extracted with cpio • Actually you can use MinGW • Why? • If you really know what you're doing
- 49. Questions?