Movatterモバイル変換

[Python-Dev] PEP 309: Partial method application

• Previous message:[Python-Dev] Deprecating builtin id (and moving it to,sys())
• Next message:[Python-Dev] PEP 309: Partial method application
• Messages sorted by:[ date ][ thread ][ subject ][ author ]

I missed the discussion on this (http://www.python.org/peps/pep-0309.html), but then 2.5 isn't out yet.I think partial() misses an important use case of method getting, for instance:     lst = ['A', 'b', 'C']     lst.sort(key=partialmethod('lower'))Which sorts by lower-case.  Of course you can use str.lower, except you'll have unnecessarily enforced a type (and excluded Unicode).  So you are left with lambda x: x.lower().Here's an implementation:     def partialmethod(method, *args, **kw):         def call(obj, *more_args, **more_kw):             call_kw = kw.copy()             call_kw.update(more_kw)             return getattr(obj, method)(*(arg+more_args), **call_kw)         return callThis is obviously related to partial().  Maybe this implementation should be a classmethod or function attribute, partial.method().-- Ian Bicking  /ianb at colorstudy.com  /http://blog.ianbicking.org

• Previous message:[Python-Dev] Deprecating builtin id (and moving it to,sys())
• Next message:[Python-Dev] PEP 309: Partial method application
• Messages sorted by:[ date ][ thread ][ subject ][ author ]