builtin.py 文件源码

def patchable_builtin(klass):
    # It's important to create variables here, we want those objects alive
    # within this whole scope.
    name = klass.__name__
    target = klass.__dict__

    # Hardcore introspection to find the `PyProxyDict` object that contains the
    # precious `dict` attribute.
    proxy_dict = SlotsProxy.from_address(id(target))
    namespace = {}

    # This is the way I found to `cast` this `proxy_dict.dict` into a python
    # object, cause the `from_address()` function returns the `py_object`
    # version
    ctypes.pythonapi.PyDict_SetItem(
        ctypes.py_object(namespace),
        ctypes.py_object(name),
        proxy_dict.dict,
    )
    return namespace[name]