[Tutor] Entry in Tkinter

[Diego Prestes]

Hello,
    Im trying tu use the Entry widget. I type a word in the Entry and in 
find1 module it use the entry using the option self.proc.get(), but when 
I use this, I have this error:

    AttributeError: 'NoneType' object has no attribute 'get'

    In a test I try to use the Entry and it works normally, but in my 
program not.
    Someone know what I could be doing wrong?

self.find1 = Button(frame3, text="Find", command=self.find1).pack(side=LEFT)
self.proc = Entry(frame3, background="white").pack(side=LEFT)

def find1(self):  #count the number of times that the word in the text
        vpal = count(self.text,self.proc.get())
        tkMessageBox.showinfo("Find","%s and %d" % (self.proc.get(),vpal))

    Diego

PS: If someone dont understand my english ask me and I'll try to explain 
better.