我不会说 Python，但它在 C++ 中相当容易.

I can't speak for python, but it's fairly easy in C++.

首先在创建小部件后设置策略:

first after creating the widget you set the policy:

w->setContextMenuPolicy(Qt::CustomContextMenu);

然后将上下文菜单事件连接到插槽:

then you connect the context menu event to a slot:

connect(w, SIGNAL(customContextMenuRequested(const QPoint &)), this, SLOT(ctxMenu(const QPoint &)));

最后，您实现了插槽:

void A::ctxMenu(const QPoint &pos) {
    QMenu *menu = new QMenu;
    menu->addAction(tr("Test Item"), this, SLOT(test_slot()));
    menu->exec(w->mapToGlobal(pos));
}

这就是你在 c++ 中的做法，在 python API 中应该不会有太大的不同.

that's how you do it in c++ , shouldn't be too different in the python API.

在谷歌上环顾四周后，这是我在python中的示例的设置部分:

after looking around on google, here's the setup portion of my example in python:

self.w = QWhatever();
self.w.setContextMenuPolicy(Qt.CustomContextMenu)
self.connect(self.w,SIGNAL('customContextMenuRequested(QPoint)'), self.ctxMenu)