如果您对我应该如何在 python 中执行以下任务有任何建议，我正在徘徊: 假设我有以下类(class):
class A(object):
self._classes = []
def magic(self):
c.foo() for c in self._classes
class B(object):
def foo():'''some cool stuff here'''
class C(B):
def foo():'''very cool stuff'''
class D(B):
def foo():'''very cool stuff'''
我想做的是，当类 A 被实例化时，类型 B 的所有类(C 和 D)都将在 self._classes 中被实例化，这意味着 _classes 是 [C(),D()]。
这样做的一般动机是，我希望用户可以轻松添加类，而无需了解使用它们的类。任何帮助都会得到应用。
请您参考如下方法:
瞧(感谢 this answer 的 all_subclasses()):
# recursively get all subclasses of a given class
def all_subclasses(cls):
return cls.__subclasses__() + [g for s in cls.__subclasses__()
for g in all_subclasses(s)]
class B(object):
def foo(self): print '''some cool stuff here in B'''
class C(B):
def foo(self): print '''very cool stuff in C'''
class D(B):
def foo(self): print '''very cool stuff in D'''
class E(D):
def foo(self): print '''very cool stuff in E'''
class A(object):
def __init__(self):
self._classes = [cls() for cls in all_subclasses(B)]
def magic(self):
for c in self._classes: c.foo()
# usage:
A().magic()
输出:
very cool stuff in C
very cool stuff in D
very cool stuff in E
