使用python的靈活類名（使用py2neo元類）

Question

到現在為止，我還沒有找到這個問題的答案（比py2neo的顯式表達式更常見的Python問題），我希望能夠靈活地調用py2neo類：

class foo1(GraphObject):
    __primarykey__ = "bar"
    bar = Property()
    foobar = RelatedTo("foo1")
    foobar2 = RelatedTo("foo1")

class foo2(GraphObject):
    __primarykey__ = "bar"
    bar = ""
    foobar = RelatedTo("foo2")
    foobar2 = RelatedTo("foo2")

def flexiblefoocreate(classname,newbar):
    #classname is "foo1" or "foo2"
    tempvar=classname()
    tempvar.bar=newbar

def flexiblefoobaradding(classname,startbar,foobarname,endbar)
    #classname is "foo1" or "foo2"
    #foobarname is "foobar" or "foobar2"
    startfoo=classname()
    startfoo.bar=startbar
    endfoo=classname()
    endfoo.bar=endbar
    startfoo.foobarname.add(endfoo)

我該如何工作？

背景：稍后輕松添加/使用屬性

Answer 1

您可以使用元類：

class Foo1(object):
    def d1(self):
        print(self, ".d1")


class Foo2(object):
    def d2(self):
        print(self, ".d2")


def make_class(base):
    return type(str(base), (base,), {})


MyExtraordinarilyNamedFoo1Class = make_class(Foo1)
MySimpleFoo2Class = make_class(Foo2)

foo1 = MyExtraordinarilyNamedFoo1Class()
foo2 = MySimpleFoo2Class()

foo1.d1()
foo1.new_attr = 1
print(foo1.new_attr)

foo2.d2()
foo2.new_attr = 2
print(foo2.new_attr)