[Jython-dev] Type of subclassed new-style types.

[Darek S. <ds...@us...>]

Hello,
I've just uploaded a patch to make enumerate a new-style type
http://sf.net/tracker/index.php?func=detail&aid=1094757&group_id=12867&atid=312867.

However, it fails on one test currently (not to mention those
requiring sets module) and on closer inspection it seems that
enumerate is not the only new-style type that is not behaving
well wrt subclassing.

Consider this:

dsuch@rampart ~
$ cat test_newstyle_subclass.py
class myenum(enumerate):pass
class myfloat(float): pass
class myint(int): pass
class mylong(long): pass
class mycomplex(complex): pass
class mylist(list): pass
class mytuple(tuple): pass
class mydict(dict): pass


print type(myenum([1])), myenum
print type(myfloat(1)), myfloat
print type(myint(1)), myint
print type(mycomplex(1)), mycomplex
print type(mylist([1])), mylist
print type(mytuple([1])), mytuple
print type(mydict({1:1})), mydict

dsuch@rampart ~
$ python -V; python test_newstyle_subclass.py
Python 2.3.5
<class '__main__.myenum'> <class '__main__.myenum'>
<class '__main__.myfloat'> <class '__main__.myfloat'>
<class '__main__.myint'> <class '__main__.myint'>
<class '__main__.mycomplex'> <class '__main__.mycomplex'>
<class '__main__.mylist'> <class '__main__.mylist'>
<class '__main__.mytuple'> <class '__main__.mytuple'>
<class '__main__.mydict'> <class '__main__.mydict'>

dsuch@rampart ~
$ jython.bat --version; jython.bat test_newstyle_subclass.py
Jython 2.2a1 on java (JIT: null)
<type 'enumerate'> <class '__main__.myenum'>
<type 'float'> <class '__main__.myfloat'>
<type 'int'> <class '__main__.myint'>
<type 'complex'> <class '__main__.mycomplex'>
<class '__main__.mylist'> <class '__main__.mylist'>
<type 'tuple'> <class '__main__.mytuple'>
<class '__main__.mydict'> <class '__main__.mydict'>

dsuch@rampart ~
$

I understand this is related to sandbox/jt/gderived.py, but I'm not sure
how to use this tool, and how to allow for proper subclassing
of enumerate (and other types).

Can someone please shed some light on this?

thanks,
darek