from Tkinter import *
from trabajo import ciudades,calcular
import tkMessageBox

class AllTkinterWidgets:
    def __init__(self, master):

        frame = Frame(master, width=500, height=400, bd=1)
        frame.pack()

        iframe1 = Frame(frame, bd=2, relief=SUNKEN)

        checks=[]
        for i in range(len(ciudades)):
            v=IntVar()
            Checkbutton(iframe1, text=ciudades[i],variable=v).grid(row=i%20,column=i/20,sticky="w")
            checks.append(v)
        checked=[]

        but=Button(master,text="Calcular",command=self.calcular)
        but.pack()
        iframe1.pack(expand=1, fill=X, pady=10, padx=5)


    def calcular(self):
        print (checks[1])
        tkMessageBox.showwarning("Resultado", "TODO")



root = Tk()
#root.option_add('*font', ('verdana', 10, 'bold'))
all = AllTkinterWidgets(root)
root.title('Tkinter Widgets')
root.mainloop()