[Tutor] Install BTrees

[Wanbo Li]

Dear all,

I am trying to install BTrees package on Mac OS X 10.7.5. And my python version is 2.7.3

So I used 'easy_install ZODB' and 'easy_install BTrees' to install the packages. 

Then when I import modules from the package, I encounter the following error:

>>> from BTrees.OOBTree import OOBTree
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/wanbo/Library/Python/2.7/lib/python/site-packages/BTrees-4.0.8-py2.7-macosx-10.6-intel.egg/BTrees/__init__.py", line 16, in <module>
    import BTrees.Interfaces
  File "/Users/wanbo/Library/Python/2.7/lib/python/site-packages/BTrees-4.0.8-py2.7-macosx-10.6-intel.egg/BTrees/Interfaces.py", line 511, in <module>
    from ZODB.POSException import BTreesConflictError
  File "/Users/wanbo/Library/Python/2.7/lib/python/site-packages/ZODB-4.0.0b3-py2.7.egg/ZODB/__init__.py", line 28, in <module>
    from ZODB.DB import DB, connection
  File "/Users/wanbo/Library/Python/2.7/lib/python/site-packages/ZODB-4.0.0b3-py2.7.egg/ZODB/DB.py", line 23, in <module>
    from ZODB.broken import find_global
  File "/Users/wanbo/Library/Python/2.7/lib/python/site-packages/ZODB-4.0.0b3-py2.7.egg/ZODB/broken.py", line 30, in <module>
    class Broken(object):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/zope/interface/declarations.py", line 495, in __call__
    raise TypeError("Can't use implementer with classes.  Use one of "
TypeError: Can't use implementer with classes.  Use one of the class-declaration functions instead.


Anyone has experience with BTrees?

Best regards,

Wanbo