pyqt和pyside开发图形化界面

#!/usr/bin/env python
import sys
from pyqt4 import qtgui,qtcore
import httplib
from urllib import urlencode
import re

def out(text):
    p = re.compile(r'","')
    m = p.split(text)
    result=unicode(m[0][4:].decode('utf-8'))
    ds_widget.setds_textedit_text(result)

def dic():
    word=ds_widget.getds_lineedit_text()
    text=urlencode({'text':word})
    h=httplib.http('translate.google.cn')
    h.putrequest('get', '/translate_a/t?client=t&hl=zh-cn&sl=en&tl=zh-cn&ie=utf-8&oe=utf-8&'+text)
    h.endheaders()
    h.getreply()
    f = h.getfile()
    lines = f.readlines()
    out(lines[0])
    f.close()

class ds_qwidget(qtgui.qwidget):
    def __init__(self):
        qtgui.qwidget.__init__(self)

        self.ds_lineedit = qtgui.qlineedit(self) 
        ds_searchbutton=qtgui.qpushbutton('search',self)
        self.ds_textedit = qtgui.qtextedit(self)

        hbox = qtgui.qhboxlayout()
        hbox.addwidget(self.ds_lineedit)
        hbox.addwidget(ds_searchbutton)

        vbox = qtgui.qvboxlayout(self)
        vbox.addlayout(hbox)
        vbox.addwidget(self.ds_textedit)

        self.resize(500, 300)
        self.setwindowtitle('dictionary')
        self.connect(ds_searchbutton, qtcore.signal('clicked()'),dic)
        self.setlayout(vbox)

    def getds_lineedit_text(self):
        return self.ds_lineedit.text()
    def setds_textedit_text(self,text):
        self.ds_textedit.settext(text)

if __name__=="__main__":
    ds_app = qtgui.qapplication(sys.argv)
    ds_widget = ds_qwidget()
    ds_widget.show()
    sys.exit(ds_app.exec_())