In article <[EMAIL PROTECTED]>, Steven Bethard <[EMAIL PROTECTED]> wrote:
py> class A: ... pass ... py> class B: ... pass ... py> a = A() py> a.__class__ == A True py> a.__class__ == B False
Uh, isinstance(a, A) works for both new-style and old-style classes. Heck, isinstance() even works in Python 1.5.2...
The OP asked "Given some object ... how do you test its type?". I interpreted this as a strict check, not a transitive check:
py> class A: ... pass ... py> class B(A): ... pass ... py> b = B() py> isinstance(b, B) True py> isinstance(b, A) True py> b.__class__ == B True py> b.__class__ == A False
Of course, if the OP doesn't need the strict check here, isinstance is, of course, the right answer.
STeve -- http://mail.python.org/mailman/listinfo/python-list
