container.py 文件源码

def __setattr__(self, name, value):
        _modules = self.__dict__.get('_modules')
        if isinstance(value, Module):
            if _modules is None:
                raise AttributeError(
                    "cannot assign module before Container.__init__() call")
            _modules[name] = value
        elif _modules is not None and name in _modules:
            if value is not None:
                raise TypeError("cannot assign '{}' as child module '{}' "
                                "(torch.nn.Module or None expected)"
                                 .format(torch.typename(value), name))
            _modules[name] = value
        else:
            Module.__setattr__(self, name, value)