**this is my main file:**
ExcelAppl = win32com.client.Dispatch('Excel.Application')
    Workbook = ExcelAppl.Workbooks.Open('excel file path')
    Sheet = Workbook.Worksheets.Item(1)
    Sheet1 = Workbook.Worksheets.Item(2)
**this is the Python gui:**
from Tkinter import *
from tkMessageBox import *
from tkColorChooser import askcolor              
import tkFileDialog
import MainLibrary

root = Tk()
root.title("Chrysler Test Framework")
root.geometry("800x500")

def callback():
    file_path = tkFileDialog.askopenfilename(filetypes=[("Excel files","*.xls")])
    print "the file path  %s",file_path
    Text_button.insert(INSERT,file_path)
    MainLibrary.second(str(file_path))
def execute():
    execfile("MainLibrary.py")

Browse_button = Button(text='Browse', command=callback).pack(side=LEFT, padx=10, pady=20, ipadx=20, ipady=10)
Execution_button = Button(text='Convert', command=execute).pack(side=BOTTOM, padx=10, pady=20, ipadx=20, ipady=10)


def quit():
    root.destroy()
quit_button = Button( text='Goodbye!',command=quit, padx = 20).pack(side=RIGHT, padx=10, pady=20, ipadx=20, ipady=10)

root.mainloop()



This is my query.I need to get the  file_path from the GUI and assign it to the (Workbook = ExcelAppl.Workbooks.Open('excel file path').Can you let me know how to do it.