[Código-PyQT4] View Source - JaAViEr

# -*- coding: utf-8 -*-
import sys, urllib2
from PyQt4 import QtCore, QtGui

class view_source(QtGui.QWidget):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self,parent)
        self.resize(466, 407)
        self.vercode = QtGui.QPushButton("View Source",self)
        self.vercode.setGeometry(200, 380, 105, 24)
        self.http_host = QtGui.QLineEdit(self)
        self.http_host.setGeometry(90, 10, 371, 25)
        self.http_host.setEchoMode(QtGui.QLineEdit.Normal)
        self.url = QtGui.QLabel("Host / URL",self)
        self.url.setGeometry(20, 17, 71, 16)
        self.viewcode = QtGui.QLabel("View Source",self)
        self.viewcode.setGeometry(10, 35, 121, 16)
        self.code = QtGui.QPlainTextEdit(self)
        self.code.setGeometry(0, 50, 461, 331)
        self.code.setFrameShadow(QtGui.QFrame.Raised)
        self.setWindowTitle("View Source - JaAViEr")
        self.connect(self.vercode,QtCore.SIGNAL("clicked()"),self.vista_code)
    def vista_code(self):
      pagina=urllib2.urlopen(str(self.http_host.text()))
      self.code.setPlainText(pagina.read())
aplicacion=QtGui.QApplication(sys.argv)
view=view_source()
view.show()
aplicacion.exec_()