带有PyQt5和线程的PyQt5

Question

如果我在下面运行thread_test.py代码，那么我在线程中的函数就能正常运行。但是，如果我用cx_Freeze编译它，那么它就会在调用glob时挂掉。它不会给出错误，gui会保持响应，但是线程似乎只是挂起(什么都不做)。除了glob之外，我还测试了其他几个功能，所以glob本身不是问题。我尝试从multiprocessing中添加freeze_support，尽管我没有使用multiprocessing，但这并没有帮助。有什么可能导致这种情况的原因吗？这与使用Anaconda而不是香草蟒蛇有关吗？

我意识到像这样使用日志不一定是线程安全的，但是对于这个演示来说它是好的。

作为参考，我正在使用：

• Windows 7企业，服务包1
• Anaconda 4.2.0 (Python2.7.12)
• cx_Freeze 5.0
• PyQt5 5.6.0

thread_test.py：

from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.QtCore import QThread, QObject, pyqtSignal, pyqtSlot

import sys
import time
import glob
import logging

log = logging.getLogger(__name__)
log.setLevel(logging.DEBUG)
log.addHandler(logging.StreamHandler())

class worker_object(QObject):
    finished = pyqtSignal()

    def __init__(self):
        super(self.__class__, self).__init__()
        log.info('2. Worker Object Initialized')

    @pyqtSlot()
    def run_thread(self):
        log.info('5.  Worker 1/5')
        time.sleep(0.5)
        log.info('    Worker 2/5')
        glob.glob('*.jpg')
        log.info('    Worker 3/5')
        time.sleep(0.5)
        log.info('    Worker 4/5')
        self.finished.emit()
        log.info('    Worker 5/5')

class test_window(QMainWindow):
    def __init__(self):
        super(self.__class__, self).__init__()
        log.info('1. Window Initialization (Started)')

        self.centralwidget = QtWidgets.QWidget(self)
        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)

        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setText('Start!')
        self.verticalLayout.addWidget(self.pushButton)

        self.progressBar = QtWidgets.QProgressBar(self.centralwidget)
        self.progressBar.setRange(0,1)
        self.verticalLayout.addWidget(self.progressBar)

        self.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(self)
        self.setStatusBar(self.statusbar)

        self.pushButton.clicked.connect(self.execute)

        # Setup threading
        self.thread = QThread()
        self.worker_object = worker_object()
        self.worker_object.moveToThread(self.thread)
        self.worker_object.finished.connect(self.onFinished)
        self.thread.started.connect(self.worker_object.run_thread)
        log.info('3. Window Initialization (Finished)')

    def onFinished(self):
        self.thread.quit()
        self.statusbar.showMessage('Finished!')
        self.setEnabled(True)
        self.progressBar.setRange(0,1)
        log.info('6.  Thread Finished')

    def execute(self):
        self.statusbar.showMessage('Working')
        self.setEnabled(False)
        self.progressBar.setRange(0,0)
        log.info('4.  Thread Starting')
        self.thread.start()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    form = test_window()
    form.show()
    app.exec_()

setup.py：

from cx_Freeze import setup, Executable

buildOptions = dict(packages = [], excludes = [], includes = [], include_files = [])

executables = [Executable('thread_test.py', base=None)]

setup(name='thread_test',
      version = '1.0',
      description = 'Threading Test',
      options = dict(build_exe = buildOptions),
      executables = executables)

Answer 1

值得注意的是，我刚刚安装了Anaconda3 (Anaconda4.2.0和Python3.5.2)，并安装了cx_Freeze。用这个，一切都很好。所以，也许它是python2.7上的cx_Freeze中的一个bug，我不确定。