[Tkinter] [python]Problem in creating menu[/python]

[yamoon]

 I've saved the menu details in a dictionary, then I was trying to call it to create menu by using loop but its not working, can any body here help to find the solution and here is my code

from tkinter import *
from tkinter import ttk
from tkinter import messagebox
from tkinter import filedialog
import numpy as np


file_menu_dict = {'Open' : 'self.open_file()' ,
                         'Save' : '',
                         'Save as': '',
                         'Print' : '',
                         'Close' : '',
                         'Exit'  : '',                            
                        }

class My_actions():
    def __init__(self):#, **kwds): 
        pass
    def open_file(self ):
        file_name = filedialog.askopenfilename(filetypes=(("PNG","*.png"),("Gif","*.gif"),("All files","*.*")))
        image_file = open(file_name).read()
        print(image_file)

    def all_menu(self, main_menu , all_menu_dict):
        #File menu
        for i,j in all_menu_dict.items():    
            main_menu.add_command( label = i,  command = lambda : j)

class My_frame(My_actions):#My_actions):
    def __init__(self, **kwds):
        super().__init__()

        #Menu frame start
        self.menu_frame = LabelFrame(kwds['root'] )
        self.menu_frame.background = 'red'
        self.menu_frame.grid(row = 2, column = 0, columnspan=4, sticky= kwds['sticky'])#side  = menu_side)
                
        #Menu frame end
        
    def all_menu_frame(self, root):  
            #menu start here
            menubar = Menu(self.menu_frame)
            root.config(menu = menubar)
            file = Menu(menubar)
            
            menubar.add_cascade(menu=file, label="File")
            
            # Method to call file menu
            self.all_menu(file, file_menu_dict)

            #menu end here
#Class my frame for both menu & status menu  end here

def main():
    root = Tk()
    window_size_x=0
    window_size_y=0
        
    root.geometry("%dx%d+%d+%d" %(root.winfo_screenwidth(), root.winfo_screenheight(), window_size_x, window_size_y))
    
    actions = My_frame( root=root, frame_width=400, frame_height =50, sticky='S')    
    actions.all_menu_frame(root = root)
    

    root.mainloop()
 
if __name__ == '__main__' : main()