kj <no.em...@please.post> wrote: >>In (almost?) all cases any objects constructed by a subclass of a >>builtin class will be of the original builtin class. > > > What I *really* would like to know is: how do *you* know this (and > the same question goes for the other responders who see this behavior > of dict as par for the course). Can you show me where it is in > the documentation? I'd really appreciate it. TIA! >
I know it from experience (and reading source). So far as I can tell it isn't explicitly stated anywhere in the documentation. Mostly the documentation just says a method returns 'a copy of' prossibly with some modification. For example: str.capitalize() Return a copy of the string with its first character capitalized and the rest lowercased. That is ambiguous as it leaves open the question whether it returns "a string that is a copy" or an object of the type being operated upon. It happens to be the former but it doesn't actually say. -- Duncan Booth http://kupuguy.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list