class MyClass(object): def __init__(self): self.data = {'a': 'v1', 'b': 'v2'} def __getattr__(self, attr): return self.data[attr]>>> ob = MyClass()>>> v = ob.a>>> v'v1'
__setattr__不过在实施时要小心，您将需要进行一些修改：
class MyClass(object): def __init__(self): # prevents infinite recursion from self.data = {'a': 'v1', 'b': 'v2'} # as now we have __setattr__, which will call __getattr__ when the line # self.data[k] tries to access self.data, won't find it in the instance # dictionary and return self.data[k] will in turn call __getattr__ # for the same reason and so on.... so we manually set data initially super(MyClass, self).__setattr__('data', {'a': 'v1', 'b': 'v2'}) def __setattr__(self, k, v): self.data[k] = v def __getattr__(self, k): # we don't need a special call to super here because getattr is only # called when an attribute is NOT found in the instance's dictionary try: return self.data[k] except KeyError: raise AttributeError>>> ob = MyClass()>>> ob.c = 1>>> ob.c1
如果您不需要设置属性，只需使用namedtuple例如。
>>> from collections import namedtuple>>> MyClass = namedtuple("MyClass", ["a", "b"])>>> ob = MyClass(a=1, b=2)>>> ob.a1如果您想要默认参数，则可以围绕它编写包装类：
class MyClass(namedtuple("MyClass", ["a", "b"])): def __new__(cls, a="v1", b="v2"): return super(MyClass, cls).__new__(cls, a, b)或者作为函数看起来更好：
def MyClass(a="v1", b="v2", cls=namedtuple("MyClass", ["a", "b"])): return cls(a, b)>>> ob = MyClass()>>> ob.a'v1'
