* Steven D'Aprano <st...@pearwood.info> [110316 05:26]: > Tim Johnson wrote: > > What is the difference between using > > hasattr(object, name) > > and > > name in dir(object) > > ? > > Did you read the Fine Manual? No but I will :) > http://docs.python.org/library/functions.html#dir > > "The default dir() mechanism behaves differently with different > types of objects, as it attempts to produce the most relevant, > rather than complete, information: ... > Note: Because dir() is supplied primarily as a convenience for use > at an interactive prompt, it tries to supply an interesting set of > names more than it tries to supply a rigorously or consistently > defined set of names, and its detailed behavior may change across > releases." help(dir) speaks similarly > > And here's an example: > > >>> class C(object): > ... pass > ... > >>> hasattr(C, '__eq__') > True > >>> '__eq__' in dir(C) > False I like Wayne's approach a lot. thanks
-- Tim tim at johnsons-web dot com or akwebsoft dot com http://www.akwebsoft.com _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
