Weather Tkinter

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# By Sergio López
# GPLv3
# http://daemonfreedom.blogspot.com/

from Tkinter import *   #For GUI
import urllib2          #For urlopen

class Application(Frame):
    """For GUI Aplication"""
    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.grid()
        self.myvar =StringVar()
        self.createWidgets()

    def createWidgets(self):
        self.cpLabel = Label(self, text="Código postal:")
        self.textEntry = Entry(self, textvariable=self.myvar)
        self.okButton = Button ( self, text='Ok', command=self.okAction )
        self.quitButton = Button ( self, text='Salir', command=self.quit )
        self.textZone = Text(self, height=8, width=50)

        self.cpLabel.grid(row=1, column=1)
        self.textEntry.grid(row=1, column=2)
        self.okButton.grid(row=1, column=3)
        self.quitButton.grid(row=1, column=4)
        self.textZone.grid(row=3, column=1)

    def okAction(self):
        self.textZone.delete(1.0, END)
        self.myvar = self.textEntry.get()
        self.imp =self.genWeather(self.myvar)
        #self.textZone.insert(END, self.imp)
        self.impList(self.imp)


    def genWeather(self, cp):
        self.cad="http://www.google.com/ig/api?weather="+cp+",spain&hl=es"
        self.lista = []

        self.f = urllib2.urlopen(self.cad)
        self.down = self.f.read()
        self.f.close()

        for self.element in self.down:
            if self.element == "<":
                self.cadena =""
            if self.element == ">":
                self.cadena=self.cadena+">"
                self.lista.append(self.cadena)
                self.cadena=""
            self.cadena =self.cadena+self.element
        self.final=[self.lista[4], self.lista[5], self.lista[13], self.lista[14], self.lista[15], self.lista[16], self.lista[18]]
        return self.final


    def impList(self, paramtolist):
        for self.element in paramtolist:
            self.textZone.insert(END, self.element)
            self.textZone.insert(END, "\n")


def main():
    app = Application()
    app.master.title("Weather Tkinter")
    app.mainloop()
    return 0


if __name__ == '__main__':
    main()