报错：
QObject::setParent: Cannot set parent, new parent is in a different thread
2021-03-27 19:58:38.354 Python[1331:38623] WARNING: NSWindow drag regions should only be invalidated on the Main Thread! This will throw an exception in the future. Called from (0 AppKit 0x00007fff22bd047f -[NSWindow(NSWindow_Theme) _postWindowNeedsToResetDragMarginsUnlessPostingDisabled] + 3521 AppKit 0x00007fff22bbb121 -[NSWindow _initContent:styleMask:backing:defer:contentView:] + 13752 AppKit 0x00007fff22d7d377 -[NSPanel _initContent:styleMask:backing:defer:contentView:] + 503 AppKit 0x00007fff22bbabbb -[NSWindow initWithContentRect:styleMask:backing:defer:] + 424 AppKit 0x00007fff22d7d32c -[NSPanel initWithContentRect:styleMask:backing:defer:] + 645 AppKit 0x00007fff22ec51f4 -[NSWindow initWithContentRect:styleMask:backing:defer:screen:] + 526 libqcocoa.dylib 0x0000000136c61745 -[QNSPanel initWithContentRect:styleMask:backing:defer:screen:platformWindow:] + 1977 libqcocoa.dylib 0x0000000136c4dcac _ZN12QCocoaWindow14createNSWindowEb + 13248 libqcocoa.dylib 0x0000000136c47672 _ZN12QCocoaWindow22recreateWindowIfNeededEv + 12669 libqcocoa.dylib 0x0000000136c470fe _ZN12QCocoaWindow10initializeEv + 31810 QtGui 0x000000010abb7eb7 _ZN14QWindowPrivate6createEby + 15111 QtWidgets 0x0000000109cfc771 _ZN14QWidgetPrivate6createEv + 118512 QtWidgets 0x0000000109cfb414 _ZN7QWidget6createEybb + 32413 QtWidgets 0x0000000109d0e81d _ZN14QWidgetPrivate10setVisibleEb + 18914 QtWidgets 0x0000000109ed557d _ZN7QDialog10setVisibleEb + 26915 QtWidgets 0x0000000109ed4d80 _ZN7QDialog4execEv + 24016 QtWidgets 0x0000000109f12a72 _ZL17showNewMessageBoxP7QWidgetN11QMessageBox4IconERK7QStringS5_6QFlagsINS1_14StandardButtonEES7_ + 35417 QtWidgets.abi3.so 0x00000001091f0c4b _ZL24meth_QMessageBox_warningP7_objectS0_S0_ + 23518 Python 0x00000001089af1bd _PyMethodDef_RawFastCallKeywords + 68519 Python 0x00000001089ae5ba _PyCFunction_FastCallKeywords + 4220 Python 0x0000000108a6d804 call_function + 72421 Python 0x0000000108a6a7dd _PyEval_EvalFrameDefault + 2518122 Python 0x00000001089ae9f0 function_code_fastcall + 12823 Python 0x00000001089adfe4 _PyFunction_FastCallDict + 14824 Python 0x00000001089af49f _PyObject_Call_Prepend + 14325 Python 0x00000001089ae6e7 PyObject_Call + 13526 Python 0x0000000108a6aaee _PyEval_EvalFrameDefault + 2596627 Python 0x00000001089ae9f0 function_code_fastcall + 12828 Python 0x0000000108a6d812 call_function + 73829 Python 0x0000000108a6a7c3 _PyEval_EvalFrameDefault + 2515530 Python 0x00000001089ae9f0 function_code_fastcall + 12831 Python 0x0000000108a6d812 call_function + 73832 Python 0x0000000108a6a7c3 _PyEval_EvalFrameDefault + 2515533 Python 0x00000001089ae9f0 function_code_fastcall + 12834 Python 0x00000001089adfe4 _PyFunction_FastCallDict + 14835 Python 0x00000001089af49f _PyObject_Call_Prepend + 14336 Python 0x00000001089ae6e7 PyObject_Call + 13537 Python 0x0000000108af5b47 t_bootstrap + 7138 Python 0x0000000108aac899 pythread_wrapper + 2539 libsystem_pthread.dylib 0x00007fff2035a950 _pthread_start + 22440 libsystem_pthread.dylib 0x00007fff2035647b thread_start + 15
)原因
在使用pyqt的时候，我使用threading创建了一个线程然后在里面处理数据，处理的时候检测异常然后用qmessagebox提示错误信息时报错上面内容。
原因很简单不能在线程的函数里面使用qmessagebox