Created
December 31, 2017 01:38
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# Python 3.3 only | |
class klass(object): | |
def __init__(self, name, klass, bases, children=None): | |
self.name = name | |
self.klass = klass | |
self.bases = bases | |
self.children = children or [] | |
def __repr__(self): | |
return '{} {}({})'.format(self.klass, self.name, | |
[b.__name__ for b in self.bases]) | |
class SubClassTracker(type): | |
tracker = {} | |
def __new__(cls, name, base_classes, attrs): | |
SubClassTracker.tracker[name] = klass(name, cls, base_classes) | |
for b in base_classes: | |
bname = b.__name__ | |
if bname in SubClassTracker.tracker: | |
SubClassTracker.tracker[bname].children.append(name) | |
return type.__new__(cls, name, base_classes, attrs) | |
class ParentClass(metaclass=SubClassTracker): | |
def __init__(self, foo): | |
self.foo = foo | |
def __repr__(self): | |
return 'ParentClass(foo={})'.format(self.foo) | |
class ChildClass(ParentClass): | |
def __init__(self, foo, bar): | |
super(ChildClass, self).__init__(foo) | |
self.bar = bar | |
def __repr__(self): | |
return 'ChildClass(foo={}, bar={})'.format(self.foo, self.bar) | |
class ChildClass2(ParentClass): | |
def __init__(self): | |
super(ChildClass2, self).__init__(True) | |
def __repr__(self): | |
return 'ChildClass2()' | |
def InbredGrandchildClass(ChildClass, ChildClass2): | |
def __init__(self): | |
self.bar = 1 | |
c = ChildClass(1, 2) |
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