晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //lib64/python2.7/idlelib/dynOptionMenuWidget.py
"""
OptionMenu widget modified to allow dynamic menu reconfiguration
and setting of highlightthickness
"""
import copy
from Tkinter import OptionMenu, _setit, StringVar, Button

class DynOptionMenu(OptionMenu):
    """
    unlike OptionMenu, our kwargs can include highlightthickness
    """
    def __init__(self, master, variable, value, *values, **kwargs):
        # TODO copy value instead of whole dict
        kwargsCopy=copy.copy(kwargs)
        if 'highlightthickness' in 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)

def _dyn_option_menu(parent):  # htest #
    from Tkinter import Toplevel

    top = Toplevel()
    top.title("Tets dynamic option menu")
    top.geometry("200x100+%d+%d" % (parent.winfo_rootx() + 200,
                  parent.winfo_rooty() + 150))
    top.focus_set()

    var = StringVar(top)
    var.set("Old option set") #Set the default value
    dyn = DynOptionMenu(top,var, "old1","old2","old3","old4")
    dyn.pack()

    def update():
        dyn.SetMenu(["new1","new2","new3","new4"], value="new option set")
    button = Button(top, text="Change option set", command=update)
    button.pack()

if __name__ == '__main__':
    from idlelib.idle_test.htest import run
    run(_dyn_option_menu)

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