WARNING: QApplication was not created in main() thread
问题 When I try to develop a parallel python application using the ~threading module~, I get the following error Python Process finished with exit code 139 (interrupted by signal 11: SIGSEGV)" I'm using python 3.6 ,Linux 16.04 and Pycharm 2018 I cannot understand the reason and how to fix it. Code Sample: numOfThread = 8 class myThread (threading.Thread): def __init__(self, thread_id, name, frames): threading.Thread.__init__(self) self.thread_id = thread_id self.name = name self.frames = frames