Python GUI for file reading and subprocess call.

from tkinter import *
from tkinter import filedialog
from tkinter import *
from tkinter import ttk
from tkinter.filedialog import askopenfilename
root = Tk()
name = ""
def OpenFile():
    name = askopenfilename(initialdir="C:/Users/Batman/Documents/Programming/tkinter/", filetypes =(("Text File", "*.txt"),("All Files","*.*")), title = "Choose a file." )
    print (name)
    try:
        with open(name,'r') as UseFile:
            print(UseFile.read())
    except:
        print("No file exists")
def browseFiles(): 
    filename = filedialog.askopenfilename(initialdir = "/", 
                                          title = "Select a File", 
                                          filetypes = (("Text files", 
                                                        "*.txt*"), 
                                                       ("all files", 
                                                        "*.*"))) 
       
    # Change label contents 
    label_file_explorer.configure(text="File Opened: "+filename)

# File opener toolbar part. (browseFile function)
Title = root.title( "File Opener")
label = ttk.Label(root, text ="I'm BATMAN!!!",foreground="red",font=("Helvetica", 16))
label.pack()
menu = Menu(root)
root.config(menu=menu)
file = Menu(menu)
file.add_command(label = 'Open', command = OpenFile)
file.add_command(label = 'Exit', command = lambda:exit())
menu.add_cascade(label = 'File', menu = file)

# file explorer part (OpenFile function)
Title = root.title( "File Opener")
label = ttk.Label(root, text ="I'm BATMAN!!!",foreground="red",font=("Helvetica", 16))
label.pack()
#Menu Bar
menu = Menu(root)
root.config(menu=menu)
file = Menu(menu)
file.add_command(label = 'Open', command = OpenFile)
file.add_command(label = 'Exit', command = lambda:exit())
menu.add_cascade(label = 'File', menu = file)

# Button for shell call
# tkinter.Button(root, text="Push me!", command=lambda: sub.call('path/to/script')).pack()
Button(root, text="Push me!", command=lambda: sub.call(name)).pack()

root.mainloop()