基本上,我想用staticmethods
创建一个“template”类型的对象,然后创建一个新对象,该对象继承自它,但使用父对象的方法,其中使用子对象的参数functools.partial
。子对象的参数与父对象的方法的参数具有相同的名称。由此产生的范例如下:
class Naked:
@staticmethod
def echo1(foo):
return f"echo1: {foo}"
@staticmethod
def echo2(bar, bla):
return f"echo2: {bar}, {bla}"
class Clothed(Naked):
def __init__(self, *args, **kwargs):
for arg in args:
setattr(self, arg, arg)
for k,v in kwargs.items():
setattr(self, k, v)
a = Clothed(foo = "Hello", bar = "World")
a.echo1 == "echo1: Hello"
a.echo2("wsup?") == "echo2: World, wsup?"
以下是一个无效的尝试:
from inspect import signature
from functools import partial
class Meta(type):
def __init__(cls, name, bases, attrs):
funcs = (k for k,v in attrs.items() if callable(v) and k not in dir(type)) #this doesn't work...
for func in funcs:
args = signature(func).keys() #function argument names
newargs = {arg:getattr(self, arg, None) for arg in args} #create dictionary with val from instance, how is this possible, no self here?
attrs[func] = partial(func,newargs)
return type.__init__(cls, name, bases, attrs)
class Naked(metaclass=Meta):
@staticmethod
def echo1(foo):
return f"echo1: {foo}"
@staticmethod
def echo2(bar, bla):
return f"echo2: {bar}, {bla}"
class Clothed(Naked):
def __init__(self, *args, **kwargs):
for arg in args:
setattr(self, arg, arg)
for k,v in kwargs.items():
setattr(self, k, v)
我不知道如何使用元类来实现这一点,但是这里有一个使用mixin类的可能解决方案。你也许可以用这样的东西。你知道吗
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