That's not going to hold true for generator functions or iterators that are implemented on sequences without '__iter__.' You might also want to check for __getitem__. I'm not sure if there's a way to tell if a function is a generator without actually calling it.
-Jeff On 7/25/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > You can use the built-in dir() function to determine whether or not > the __iter__ method exists: > > class Iterable(object): > def __iter__(self): > pass > > class NotIterable(object): > pass > > def is_iterable(thing): > return '__iter__' in dir(thing) > > print 'list is iterable = ', is_iterable(list()) > print 'int is iterable = ', is_iterable(10) > print 'float is iterable = ', is_iterable(1.2) > print 'dict is iterable = ', is_iterable(dict()) > print 'Iterable is iterable = ', is_iterable(Iterable()) > print 'NotIterable is iterable = ', is_iterable(NotIterable()) > > Results: > list is iterable = True > int is iterable = False > float is iterable = False > dict is iterable = True > Iterable is iterable = True > NotIterable is iterable = False > > On Jul 25, 12:24 pm, Neil Cerutti <[EMAIL PROTECTED]> wrote: > > def is_iterable(obj): > > try: > > iter(obj) > > return True > > except TypeError: > > return False > > > > Is there a better way? > > > > -- > > Neil Cerutti > > > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
