there's nothing magic about klass.__name__ being the same as the identifier you assign it to
>>> class Foo: pass
...
>>> Bar = Foo
>>> Bar.__name__
'Foo'
>>> isinstance(Bar(), Foo)
True
>>> isinstance(Foo(), Bar)
True
... so, you could just make the class name be "autogenerated_for_<tablename>" or whatever.
...
>>> Bar = Foo
>>> Bar.__name__
'Foo'
>>> isinstance(Bar(), Foo)
True
>>> isinstance(Foo(), Bar)
True
... so, you could just make the class name be "autogenerated_for_<tablename>" or whatever.
Hacking globals is a Bad Thing; what if I wanted to do this inside a function and have it be local to that function?
On 1/5/06, limodou <[EMAIL PROTECTED]> wrote:
2006/1/5, Jonathan Ellis <[EMAIL PROTECTED]>:
> instead of messing with globals, it would be cleaner to have a function that
> returned the new class (typically named klass instead of class_, btw) and
> write
>
> TransCataDesc = create_class(trans_cata_desc)
>
I use globals() there because I want to make the class object to be
able imported in global namespace automaticly. Sometimes I may use
assign_class() in a function, and I don't want to write global
statement,:
def init(dbfile='test.db'):
#global Test I don't want to write this statement
test = Table('test', engine, ...)
Test = assign_class('Test', test)
I'm a lazy man.
And I want to know: is there a way to get a class object which class
name is what you want, just like:
TransCataDesc = create_class(trans_cata_desc)
class name is 'TransCataDesc'?
because new.classobj need a class name, so the function could be written as:
TransCataDesc = create_class(TransCataDesc, trans_cata_desc)
If you don't like globals(), the new version is:
def assign_class(class_name, table, **kwargs):
import new
klass = new.classobj(class_name, (object,), {})
def __init__(self, **kwargs):
for key, value in kwargs.items():
self.__dict__[key] = value
def __repr__(self):
s = []
for k in self.__class__.c.keys():
value = getattr(self, k, '')
if isinstance(value, unicode):
value = value.encode('gbk')
s.append("%s=%s" % (k, value))
return ','.join(s)
klass.__init__ = __init__
klass.__repr__ = __repr__
klass.table = table
assign_mapper(klass, table, **kwargs)
return klass
This time I add a __repr__ method for the class.
--
I like python!
My Blog: http://www.donews.net/limodou
NewEdit Maillist: http://groups.google.com/group/NewEdit
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Jonathan Ellis
http://spyced.blogspot.com
