How can I dynamic populate an option widget in tkinter depending on a choice from a drop down menu?

Question

my problem is the following: I have several files and I have made a drop down menu with the names,the next thing I need is an option menu which can be changed whenever a fil

Answer 1

As the OptionMenu gives a command option, i would suggest to keep reference to the command already given (if any) and pass it to the new options this way:

attendion, variables based on the previous answer

def __init__(self, *args, **kwargs):
    ...
    self.command=kwargs['command']
    ...

def _reset_option_menu(options, index=None):
    ...
    menu.add_command(label=string, 
                     command=lambda:self.command(),
                     value=self.om_variable.set(string))                         
        ...

Hope its of any use Btw, really usefull the answer given by Bryan Oakley,