qt gui 세마포어, 뮤텍스.

from PySide import QtCore, QtGui
from UI_mainwindow import Ui_MainWindow
from queue import Queue
import time, sys
import sys, re, urllib.request
 
class DownloadThread(QtCore.QThread):
    data_downloaded = QtCore.Signal(object)
    def __init__(self, urlq, i):
        QtCore.QThread.__init__(self)
        self.urlq = urlq
        self.id = i
        self.mutex = QtCore.QMutex()
 
    def getUrl(self, url, id):
        self.mutex.lock()
        sleepStep = 0.1
        delay = 0
        while delay < 3:
            time.sleep(sleepStep) # delay is actually set by while, but this holds for 'sleepStep' seconds
            delay += sleepStep
            print ("thread id - %s , delay - %s" %(id, delay))
 
        print ("thread id - %s , currnet url - %s" %(id, url))
        info = urllib.request.urlopen(url).info()
        self.data_downloaded.emit('%s' % (info))
        self.mutex.unlock()
        #info = urllib.request.urlopen(self.url).info()
        #print ("info - %s" %info)
        #self.list_widget.addItem('%s\n%s' % (self.url, info))
 
    def stop(self):
        print ("test - %s")
 
    def run(self):
        while not self.urlq.empty():
            self.url = self.urlq.get()
            time.sleep(3)
            htmlSource = self.getUrl(self.url, self.id)
            self.urlq.task_done()
 
        self.urlq.join()
 
class MainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QMainWindow.__init__(self, parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
 
 
        self.connect(self.ui.actionStart, QtCore.SIGNAL('triggered()'),self.start)
 
    def start(self):
        self.urlq = Queue()
        urls = ['http://google.com', 'http://twitter.com', 'http://yandex.ru',
                'http://stackoverflow.com/', 'http://www.youtube.com/']
        for url in urls :
            self.urlq.put(url)
 
        self.threads = []
        for i in range(10):
            downloader = DownloadThread(self.urlq, i)
            downloader.data_downloaded.connect(self.on_data_ready)
            self.threads.append(downloader)
            downloader.start()
 
    def on_data_ready(self, data):
        print ("d - %s" %data)
 
if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec_())