[lifeisstillgood]

I would guess complex objects - containers, or strange databasey stuff.

The way to deal with is __complex__ as a method on the object and recurse through asking the complex method to return nested simpler python types.

[danellis]

__complex__ is for converting to a complex number.

[davesque]

yeah, danellis is right. don't use __complex__ for that. it's for complex numbers:

http://docs.python.org/2/library/functions.html#complex --and-- http://docs.python.org/2/library/cmath.html