0
我寫了一些從網上下載文件的代碼。 下載時,它顯示在PyQt中使用QProgressBar的百分比。 但是,當我下載時它會停止,最後只會在完成時顯示100%。 我該怎麼做才能持續顯示百分比?如何使用PyQt連續顯示下載百分比?
這裏的Python代碼
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys, urllib2
from PyQt4.QtGui import *
from PyQt4.QtCore import *
from PyQt4 import uic
form_class = uic.loadUiType("downloadergui.ui")[0]
class MainWindow(QMainWindow, form_class):
def __init__(self):
super(MainWindow, self).__init__()
self.setupUi(self)
self.connect(self.downloadButton, SIGNAL("clicked()"), self.downloader)
def downloader(self):
print "download"
url = "[[Fill in the blank]]"
file_name = url.split('/')[-1]
u = urllib2.urlopen(url)
f = open(file_name, 'wb')
meta = u.info()
file_size = int(meta.getheaders("Content-Length")[0])
self.statusbar.showMessage("Downloading: %s Bytes: %s" % (file_name, file_size))
file_size_dl = 0
block_sz = 8192
while True:
buffer = u.read(block_sz)
if not buffer:
break
file_size_dl += len(buffer)
f.write(buffer)
downloadPercent = int(file_size_dl * 100/file_size)
self.downloadProgress.setValue(downloadPercent)
f.close()
pass
app = QApplication(sys.argv)
myWindow = MainWindow()
myWindow.show()
app.exec_()
相關:http://stackoverflow.com/q/2482437/1994235和http://stackoverflow.com/q/30823863/1994235 –