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问题描述
可以为 QObject 捕获 destroyed() 信号，但我想简单地测试一下 Python 对象是否仍然引用有效的 C++ Qt 对象.有没有直接这样做的方法?
The destroyed() signal can be trapped for a QObject, but I would like to simply test if the Python object still references a valid C++ Qt object. Is there a method for doing so directly?
推荐答案
如果你导入了 sip 模块，你可以调用它的 .isdeleted 函数.
If you import the sip module you can call its .isdeleted function.
import sip
from PyQt4.QtCore import QObject
q = QObject()
sip.isdeleted(q)
False
sip.delete(q)
q
<PyQt4.QtCore.QObject object at 0x017CCA98>
q.isdeleted(q)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
RuntimeError: underlying C/C++ object has been deleted
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