This post originated from an RSS feed registered with Python Buzz by Jeremy Hylton. Original Post: Recognizing a Descriptor Feed Title: Jeremy Hylton's Web Log Feed URL: https://www.python.org/~jeremy/weblog/rss.xml Feed Description: A techie web log mostly about Python Latest Python Buzz Posts Latest Python Buzz Posts by Jeremy Hylton Latest Posts From Jeremy Hylton's Web Log

If you ask a subclass of Persistent for its _p_oid attribute, you will get a descriptor back; the descriptor's __get__ method returns self when called for the class. I had to fix ZODB's code for recognizing persistent objects, because it wasn't prepare to get a descriptor when it asked for an oid. This caused the error installing Formulator that Sidnei reported yesterday.