applying function on a file ,after reading it in tkinter code example

Example 1: create a file in the directory of the exe and write to it c#

string GuarnteedWritePath = System.Environment.
                             GetFolderPath(
                                 Environment.SpecialFolder.CommonApplicationData
                             );
            string FilePath = Path.Combine(GuarnteedWritePath, "LogFile.txt");

Example 2: calling a function in python upon entry content changing tkinter

from Tkinter import *

def callback(sv):
    print sv.get()

root = Tk()
sv = StringVar()
sv.trace("w", lambda name, index, mode, sv=sv: callback(sv))
e = Entry(root, textvariable=sv)
e.pack()
root.mainloop()