On Thu, 2006-09-07 at 13:28 -0500, Adrian Holovaty wrote:
> On 9/7/06, Michael Spencer <[EMAIL PROTECTED]> wrote:
> > Martin's version is indeed faster, but has a 'gotcha' in that it precludes
> > passing a keyword arguments named 'fct' to a curried function...
> > [...]
> > Better to rename fct to something less likely to clash, such as _curried_fct
>
> Good call, Michael. I've renamed the parameter to '_curried_func' in
> changeset 3735.
>
> > If you're really hunting for speed, there is a significant boost available
> > in
> > the common special case of a python function curried with one positional
> > argument. In this case, you can [ab]use the method binding machinery, e.g.:
> > [...]
> > This is about twice as fast as curry2 for the case of a python function
> > curried
> > with one argument. It also offers better introspection than either curry1 or
> > curry2, since the original signature is preserved. It's a bigger change
> > than
> > the curry2 though, since it changes the type of the curry from function to
> > bound
> > method.
>
> I was with you until "it changes the type of the curry from function
> to bound method." How does it do that?
>
> Adrian
I think what's going on is that in the try : except clause, the return
value is the actual bound method, retrieved using the __get__
magic-method.
And it doesn't work very well that way either. I've tried Michael's
method and the whole house comes tumbling down. See traceback below when
trying to load a flatpage.
3735 works pretty well.
/Marc DM
traceback :
Mod_python error: "PythonHandler django.core.handlers.modpython"
Traceback (most recent call last):
File "/usr/lib/python2.4/site-packages/mod_python/apache.py", line 299, in
HandlerDispatch
result = object(req)
File "/usr/lib/python2.4/site-packages/django/core/handlers/modpython.py",
line 163, in handler
return ModPythonHandler()(req)
File "/usr/lib/python2.4/site-packages/django/core/handlers/modpython.py",
line 140, in __call__
response = middleware_method(request, response)
File
"/usr/lib/python2.4/site-packages/django/contrib/flatpages/middleware.py", line
10, in process_response
return flatpage(request, request.path)
File "/usr/lib/python2.4/site-packages/django/contrib/flatpages/views.py",
line 23, in flatpage
f = get_object_or_404(FlatPage, url__exact=url,
sites__id__exact=settings.SITE_ID)
File "/usr/lib/python2.4/site-packages/django/shortcuts/__init__.py", line
15, in get_object_or_404
return klass._default_manager.get(*args, **kwargs)
File "/usr/lib/python2.4/site-packages/django/db/models/manager.py", line 67,
in get
return self.get_query_set().get(*args, **kwargs)
File "/usr/lib/python2.4/site-packages/django/db/models/query.py", line 211,
in get
obj_list = list(clone)
File "/usr/lib/python2.4/site-packages/django/db/models/query.py", line 103,
in __iter__
return iter(self._get_data())
File "/usr/lib/python2.4/site-packages/django/db/models/query.py", line 430,
in _get_data
self._result_cache = list(self.iterator())
File "/usr/lib/python2.4/site-packages/django/db/models/query.py", line 171,
in iterator
select, sql, params = self._get_sql_clause()
File "/usr/lib/python2.4/site-packages/django/db/models/query.py", line 444,
in _get_sql_clause
joins2, where2, params2 = self._filters.get_sql(opts)
File "/usr/lib/python2.4/site-packages/django/db/models/query.py", line 574,
in get_sql
joins2, where2, params2 = val.get_sql(opts)
File "/usr/lib/python2.4/site-packages/django/db/models/query.py", line 622,
in get_sql
return parse_lookup(self.kwargs.items(), opts)
File "/usr/lib/python2.4/site-packages/django/db/models/query.py", line 734,
in parse_lookup
joins2, where2, params2 = lookup_inner(path, lookup_type, value, opts,
opts.db_table, None)
File "/usr/lib/python2.4/site-packages/django/db/models/query.py", line 785,
in lookup_inner
intermediate_table = field.m2m_db_table()
TypeError: _get_m2m_db_table() takes exactly 2 arguments (1 given)
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