Django 1.4 Development Environment with zc.buildout

Question

I am trying to create a dev environment for the Django 1.4 project using the following guide:

http://www.stereoplex.com/blog/a-django-development-environment-with-zc-buildout

virtualenv part of the guide runs ok with the following output:

virtualenv project
New python executable in project\Scripts\python.exe
Installing setuptools................done.
Installing pip...................done.                       

After that I am able to activate dev environment. Now I create directory named Source, download the bootstrap.py to it and create a buildout.cfg with the following content:

[buildout]
parts =

And run bootstrap.py for the following result:

Creating directory 'C:\\Dropbox\\XYZ\\project\\Source\\bin'.            
Creating directory 'C:\\Dropbox\\XYZ\\project\\Source\\parts'.          
Creating directory 'C:\\Dropbox\\XYZ\\project\\Source\\eggs'.           
Creating directory 'C:\\Dropbox\\XYZ\\project\\Source\\develop-eggs'.   
Generated script 'C:\\Dropbox\\XYZ\\project\\Source\\bin\\buildout'. 

Here comes the problem part - Installing Django I configure the buildout.cfg to the following and run bin\buildout created by bootstrap:

[buildout]
parts = django

[django]
recipe = djangorecipe
version = 1.4

After running bin\buildout i get the following error:

(project) C:\Dropbox\XYZ\project\Source>bin\buildout.exe                      
Traceback (most recent call last):           

File "C:\Dropbox\XYZ\project\Source\bin\buildout-script.py", line 15, in <module>                                                                               import site # imports custom buildout-generated site.py                       

File "C:\Dropbox\XYZ\project\Source\parts\buildout\site.py", line 601, in <module>                                                                              main()                                                                        

File "C:\Dropbox\XYZ\project\Source\parts\buildout\site.py", line 584, in main                                                                                  known_paths = addsitepackages(known_paths)                                    

File "C:\Dropbox\XYZ\project\Source\parts\buildout\site.py", line 328, in addsitepackages                                                                       import pkg_resources                                                        

ImportError: No module named pkg_resources

Although if I run python directly in project environment I can import pkg_resources with no error:

(project) C:\Dropbox\XYZ\project\Source>python                                
Python 2.7.3 (default, Apr 10 2012, 23:24:47) [MSC v.1500 64 bit (AMD64)] on win32                                                                              Type "help", "copyright", "credits" or "license" for more information.          
>>> import pkg_resources                                                        
>>> pkg_resources                                                               
<module 'pkg_resources' from 'C:\Dropbox\XYZ\project\lib\site-packages\setuptools-0.6c11-py2.7.egg\pkg_resources.py'>  

I am completely struck here. Any suggestions?

Answer 1

The guide you are following is a little bit obsolete. It will fail when processing the [django] part, specifically in the version variable. You must specify the versions in the new way, which is showed in the djangorecipe page. This is:

[buildout]
parts = django
versions = versions

[versions]
django = 1.4

Answer 2

I don't have the definitive answer, but here are some brainstorm thoughts:

• Why the virtualenv? Buildout itself provides isolation, so no virtualenv is needed. Could you re-try with just a bootstrap.py and your buildout.cfg? So just run bootstrap.py with your system python?

• Do you have buildout installed globally, perhaps? They can interfere.

• The latest 1.5.2 buildout has some problems with site.py files in some situations, which is a possible reason for it failing inside a virtualenv. Could you try the special 1.4.4 bootstrap mentioned in http://pypi.python.org/pypi/zc.buildout/1.5.2#system-python-and-zc-buildout-1-5 ?

• bin/buildout -vvv gives you much more debugging info.

An additional comment: the version setting in djangorecipe is deprecated in the latest versions of djangorecipe. You can remove it. If you want to pin Django you have to pin it in your buildout's [version] list.