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Edit: /opt/alt/python33/lib64/python3.3/idlelib/dynOptionMenuWidget.py

"""
OptionMenu widget modified to allow dynamic menu reconfiguration
and setting of highlightthickness
"""
from tkinter import OptionMenu
from tkinter import _setit
import copy

class DynOptionMenu(OptionMenu):
    """
    unlike OptionMenu, our kwargs can include highlightthickness
    """
    def __init__(self, master, variable, value, *values, **kwargs):
        #get a copy of kwargs before OptionMenu.__init__ munges them
        kwargsCopy=copy.copy(kwargs)
        if 'highlightthickness' in list(kwargs.keys()):
            del(kwargs['highlightthickness'])
        OptionMenu.__init__(self, master, variable, value, *values, **kwargs)
        self.config(highlightthickness=kwargsCopy.get('highlightthickness'))
        #self.menu=self['menu']
        self.variable=variable
        self.command=kwargs.get('command')

def SetMenu(self,valueList,value=None):
        """
        clear and reload the menu with a new set of options.
        valueList - list of new options
        value - initial value to set the optionmenu's menubutton to
        """
        self['menu'].delete(0,'end')
        for item in valueList:
            self['menu'].add_command(label=item,
                    command=_setit(self.variable,item,self.command))
        if value:
            self.variable.set(value)

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