In article <0bd314a8-db65-43f1-a999-521e2ed71...@n15g2000yqf.googlegroups.com>, dmitrey <dmitrey.kros...@scipy.org> wrote: > >Python 2.6.5 r265:79063 >>>>set().update(set()) is None >True >while I expect result of update to be set. >Also, result of >set().add(None) >is None while I expect it to be set with element None (or, maybe, it >should be empty set?)
Why are you assuming that your expectations are correct? Generally speaking, Python methods that mutate do *not* return the original object, precisely to make sure you don't make stupid mistakes. You should probably read this: http://www.catb.org/~esr/faqs/smart-questions.html -- Aahz (a...@pythoncraft.com) <*> http://www.pythoncraft.com/ "It is easier to optimize correct code than to correct optimized code." --Bill Harlan -- http://mail.python.org/mailman/listinfo/python-list
