Python:如何调用super()方法? 我有一个模块,其中两个C++类被暴露,它们都有一个方法:代码>代码():< /p>:
现在我想调用Python:如何调用super()方法? 我有一个模块,其中两个C++类被暴露,它们都有一个方法:代码>代码():< /p>:,python,c++,multiple-inheritance,super,boost-python,Python,C++,Multiple Inheritance,Super,Boost Python,现在我想调用d.foo()调用MyClassA.foo()以及MyClassB.foo()。但是,Derived.mro()看起来不错: [<class '__main__.Derived'>, <class 'my_module.MyClassA'>, <class 'my_module.MyClassB'>, <class 'Boost.Python.instance'>, <class 'object'>] [,] 。。只调用
d.foo()
调用MyClassA.foo()
以及MyClassB.foo()
。但是,Derived.mro()
看起来不错:
[<class '__main__.Derived'>, <class 'my_module.MyClassA'>, <class 'my_module.MyClassB'>, <class 'Boost.Python.instance'>, <class 'object'>]
[,]
。。只调用MyClassA.foo()
<>如何使C++方法调用它们的代码>超级()/<代码>方法?这对
在实践中,使用Boosi.Python的最佳建议可能是(C++ 11专用的头文件工具,它不依赖于整个Boost生态系统,也有类似的用途),推荐的方法是显式调用C++级父类方法,而不是通过<代码>超级< /C> >隐式地调用。简单地没有合理的方法将C++和Python方法合并到多重继承中,这不会导致用Python特定代码毫无意义地污染非Python代码。code>pybind11的方法是:
class Derived(MyClassA, MyClassB):
# Must define __init__ even though you only defer to parent classes,
# or only MyClassA will be created
def __init__(self):
MyClassA.__init__(self)
MyClassB.__init__(self)
def foo(self):
MyClassA.foo(self)
MyClassB.foo(self)
C++层没有直接访问MRO信息Python,用于通过代码>超/代码>自动实现超类调用。如果您对Python的C++知识进行了C++代码的污染,您可以直接创建一个对象:“代码> pySuffyType (必须调用两个参数;不启用ARG <代码>超级< /代码>的魔法是不可用的),使用Python代码和C++代码,这将严重地变得丑陋。
在实践中,使用Boosi.Python的最佳建议可能是(C++ 11专用的头文件工具,它不依赖于整个Boost生态系统,也有类似的用途),推荐的方法是显式调用C++级父类方法,而不是通过<代码>超级< /C> >隐式地调用。简单地没有合理的方法将C++和Python方法合并到多重继承中,这不会导致用Python特定代码毫无意义地污染非Python代码。code>pybind11的方法是:
class Derived(MyClassA, MyClassB):
# Must define __init__ even though you only defer to parent classes,
# or only MyClassA will be created
def __init__(self):
MyClassA.__init__(self)
MyClassB.__init__(self)
def foo(self):
MyClassA.foo(self)
MyClassB.foo(self)
我目前的方法(改编自answer)需要某种包装器来手动处理super()
-调用。生成的类不再需要任何特殊处理:
C++代码:
struct MyClassA{
void foo() { std::cout << "MyClassA::foo()" << std::endl; }
};
struct MyClassB{
void foo() { std::cout << "MyClassB::foo()" << std::endl; }
};
BOOST_PYTHON_MODULE(my_module){
class_<MyClassA>("MyClassACpp", init<>()).def("foo", &MyClassA::foo);
class_<MyClassB>("MyClassBCpp", init<>()).def("foo", &MyClassB::foo);
}
from my_module import MyClassACpp, MyClassBCpp
def call_super(cls, instance, method, *args):
mro = instance.__class__.mro()
for next_class in mro[mro.index(cls) + 1:]:
if not hasattr(next_class, method):
continue
if next_class.__module__ in {'Boost.Python', 'builtins'}:
continue
getattr(next_class, method)(instance, *args)
if next_class.__module__ != 'my_module':
break
class MyClassA(MyClassACpp):
def __init__(self):
call_super(MyClassA, self, '__init__')
print('MyClassA.__init__()')
def foo(self):
call_super(MyClassA, self, 'foo')
class MyClassB(MyClassBCpp):
def __init__(self):
call_super(MyClassB, self, '__init__')
print('MyClassB.__init__()')
def foo(self):
call_super(MyClassB, self, 'foo')
class Derived(MyClassA, MyClassB):
def foo(self):
super().foo()
d = Derived()
d.foo()
MyClassA.__init__()
MyClassB.__init__()
MyClassA::foo()
MyClassB::foo()
用法:
struct MyClassA{
void foo() { std::cout << "MyClassA::foo()" << std::endl; }
};
struct MyClassB{
void foo() { std::cout << "MyClassB::foo()" << std::endl; }
};
BOOST_PYTHON_MODULE(my_module){
class_<MyClassA>("MyClassACpp", init<>()).def("foo", &MyClassA::foo);
class_<MyClassB>("MyClassBCpp", init<>()).def("foo", &MyClassB::foo);
}
from my_module import MyClassACpp, MyClassBCpp
def call_super(cls, instance, method, *args):
mro = instance.__class__.mro()
for next_class in mro[mro.index(cls) + 1:]:
if not hasattr(next_class, method):
continue
if next_class.__module__ in {'Boost.Python', 'builtins'}:
continue
getattr(next_class, method)(instance, *args)
if next_class.__module__ != 'my_module':
break
class MyClassA(MyClassACpp):
def __init__(self):
call_super(MyClassA, self, '__init__')
print('MyClassA.__init__()')
def foo(self):
call_super(MyClassA, self, 'foo')
class MyClassB(MyClassBCpp):
def __init__(self):
call_super(MyClassB, self, '__init__')
print('MyClassB.__init__()')
def foo(self):
call_super(MyClassB, self, 'foo')
class Derived(MyClassA, MyClassB):
def foo(self):
super().foo()
d = Derived()
d.foo()
MyClassA.__init__()
MyClassB.__init__()
MyClassA::foo()
MyClassB::foo()
输出:
struct MyClassA{
void foo() { std::cout << "MyClassA::foo()" << std::endl; }
};
struct MyClassB{
void foo() { std::cout << "MyClassB::foo()" << std::endl; }
};
BOOST_PYTHON_MODULE(my_module){
class_<MyClassA>("MyClassACpp", init<>()).def("foo", &MyClassA::foo);
class_<MyClassB>("MyClassBCpp", init<>()).def("foo", &MyClassB::foo);
}
from my_module import MyClassACpp, MyClassBCpp
def call_super(cls, instance, method, *args):
mro = instance.__class__.mro()
for next_class in mro[mro.index(cls) + 1:]:
if not hasattr(next_class, method):
continue
if next_class.__module__ in {'Boost.Python', 'builtins'}:
continue
getattr(next_class, method)(instance, *args)
if next_class.__module__ != 'my_module':
break
class MyClassA(MyClassACpp):
def __init__(self):
call_super(MyClassA, self, '__init__')
print('MyClassA.__init__()')
def foo(self):
call_super(MyClassA, self, 'foo')
class MyClassB(MyClassBCpp):
def __init__(self):
call_super(MyClassB, self, '__init__')
print('MyClassB.__init__()')
def foo(self):
call_super(MyClassB, self, 'foo')
class Derived(MyClassA, MyClassB):
def foo(self):
super().foo()
d = Derived()
d.foo()
MyClassA.__init__()
MyClassB.__init__()
MyClassA::foo()
MyClassB::foo()
我目前的方法(改编自answer)需要某种包装器来手动处理super()
-调用。生成的类不再需要任何特殊处理:
C++代码:
struct MyClassA{
void foo() { std::cout << "MyClassA::foo()" << std::endl; }
};
struct MyClassB{
void foo() { std::cout << "MyClassB::foo()" << std::endl; }
};
BOOST_PYTHON_MODULE(my_module){
class_<MyClassA>("MyClassACpp", init<>()).def("foo", &MyClassA::foo);
class_<MyClassB>("MyClassBCpp", init<>()).def("foo", &MyClassB::foo);
}
from my_module import MyClassACpp, MyClassBCpp
def call_super(cls, instance, method, *args):
mro = instance.__class__.mro()
for next_class in mro[mro.index(cls) + 1:]:
if not hasattr(next_class, method):
continue
if next_class.__module__ in {'Boost.Python', 'builtins'}:
continue
getattr(next_class, method)(instance, *args)
if next_class.__module__ != 'my_module':
break
class MyClassA(MyClassACpp):
def __init__(self):
call_super(MyClassA, self, '__init__')
print('MyClassA.__init__()')
def foo(self):
call_super(MyClassA, self, 'foo')
class MyClassB(MyClassBCpp):
def __init__(self):
call_super(MyClassB, self, '__init__')
print('MyClassB.__init__()')
def foo(self):
call_super(MyClassB, self, 'foo')
class Derived(MyClassA, MyClassB):
def foo(self):
super().foo()
d = Derived()
d.foo()
MyClassA.__init__()
MyClassB.__init__()
MyClassA::foo()
MyClassB::foo()
用法:
struct MyClassA{
void foo() { std::cout << "MyClassA::foo()" << std::endl; }
};
struct MyClassB{
void foo() { std::cout << "MyClassB::foo()" << std::endl; }
};
BOOST_PYTHON_MODULE(my_module){
class_<MyClassA>("MyClassACpp", init<>()).def("foo", &MyClassA::foo);
class_<MyClassB>("MyClassBCpp", init<>()).def("foo", &MyClassB::foo);
}
from my_module import MyClassACpp, MyClassBCpp
def call_super(cls, instance, method, *args):
mro = instance.__class__.mro()
for next_class in mro[mro.index(cls) + 1:]:
if not hasattr(next_class, method):
continue
if next_class.__module__ in {'Boost.Python', 'builtins'}:
continue
getattr(next_class, method)(instance, *args)
if next_class.__module__ != 'my_module':
break
class MyClassA(MyClassACpp):
def __init__(self):
call_super(MyClassA, self, '__init__')
print('MyClassA.__init__()')
def foo(self):
call_super(MyClassA, self, 'foo')
class MyClassB(MyClassBCpp):
def __init__(self):
call_super(MyClassB, self, '__init__')
print('MyClassB.__init__()')
def foo(self):
call_super(MyClassB, self, 'foo')
class Derived(MyClassA, MyClassB):
def foo(self):
super().foo()
d = Derived()
d.foo()
MyClassA.__init__()
MyClassB.__init__()
MyClassA::foo()
MyClassB::foo()
输出:
struct MyClassA{
void foo() { std::cout << "MyClassA::foo()" << std::endl; }
};
struct MyClassB{
void foo() { std::cout << "MyClassB::foo()" << std::endl; }
};
BOOST_PYTHON_MODULE(my_module){
class_<MyClassA>("MyClassACpp", init<>()).def("foo", &MyClassA::foo);
class_<MyClassB>("MyClassBCpp", init<>()).def("foo", &MyClassB::foo);
}
from my_module import MyClassACpp, MyClassBCpp
def call_super(cls, instance, method, *args):
mro = instance.__class__.mro()
for next_class in mro[mro.index(cls) + 1:]:
if not hasattr(next_class, method):
continue
if next_class.__module__ in {'Boost.Python', 'builtins'}:
continue
getattr(next_class, method)(instance, *args)
if next_class.__module__ != 'my_module':
break
class MyClassA(MyClassACpp):
def __init__(self):
call_super(MyClassA, self, '__init__')
print('MyClassA.__init__()')
def foo(self):
call_super(MyClassA, self, 'foo')
class MyClassB(MyClassBCpp):
def __init__(self):
call_super(MyClassB, self, '__init__')
print('MyClassB.__init__()')
def foo(self):
call_super(MyClassB, self, 'foo')
class Derived(MyClassA, MyClassB):
def foo(self):
super().foo()
d = Derived()
d.foo()
MyClassA.__init__()
MyClassB.__init__()
MyClassA::foo()
MyClassB::foo()