[Zope3-Users] Re: Iteration over non-sequenze

[Philipp von Weitershausen]

Florian Lindner wrote:
> As I suspeted: A stupit mistake.
> 
> The implementation did not subclassed IContained resp. BTreeContainer.
> 

Mistakes like those are very human and happen to everyone. However, you 
can avoid spending hours looking for the problem (and potentially asking 
for help) through automatic test mechanisms, such as unit testing. Just 
try it out: next time you write something, write a unit test (e.g. in 
the form of a doctest) *before* you try it out in a browser... You'll be 
surprised how much sooner you find your typos, syntax errors, etc...

Philipp