Nin*_*nga 2 python multithreading pyqt qthread pyqt5
我在下面的(半)工作示例中有 4 个工作线程。我只能让前三个工作线程工作。如何让第四个线程运行?
print(QThread.idealThreadCount())在我的笔记本电脑上返回“8”。
我可以重新排序代码以使 3 个工作线程的任意组合运行。
from PyQt5.QtCore import QThread, QObject
from PyQt5.QtWidgets import QWidget
import sys
from PyQt5.QtWidgets import QApplication
import time
class A(QObject):
def run(self):
while 1:
print('A', time.ctime())
time.sleep(1)
class B(QObject):
def run(self):
while 1:
print('B', time.ctime())
time.sleep(1)
class C(QObject):
def run(self):
while 1:
print('C', time.ctime())
time.sleep(1)
class D(QObject):
def run(self):
while 1:
print('D', time.ctime())
time.sleep(1)
class window1(QWidget):
def __init__ (self, parent = None):
super().__init__ () #parent widget
print(QThread.idealThreadCount())
self.thread1 = QThread()
obj1 = A()
obj1.moveToThread(self.thread1)
self.thread1.started.connect(obj1.run)
self.thread1.start()
self.thread2 = QThread()
obj2 = B()
obj2.moveToThread(self.thread2)
self.thread2.started.connect(obj2.run)
self.thread2.start()
self.thread3 = QThread()
obj3 = C()
obj3.moveToThread(self.thread3)
self.thread3.started.connect(obj3.run)
self.thread3.start()
self.thread4 = QThread()
obj4 = D()
obj4.moveToThread(self.thread4)
self.thread4.started.connect(obj4.run)
self.thread4.start()
app = QApplication(sys.argv)
w = window1()
w.show()
sys.exit(app.exec_())
Run Code Online (Sandbox Code Playgroud)
您没有存储对 等的引用obj1。obj2由于它们没有父级(使用时需要moveToThread),因此它们将在方法结束时被垃圾收集__init__。您time.sleep(1)添加的只是延迟方法的结束__init__和垃圾收集。
如果您存储对对象的引用(例如self.obj1 = ...),那么所有线程都应该正确运行。
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