Mercurial > cpython-lru_cache-weakref

annotate Lib/idlelib/dynOptionMenuWidget.py @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents ef4cca2d6171
children
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1 """
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2 OptionMenu widget modified to allow dynamic menu reconfiguration
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3 and setting of highlightthickness
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4 """
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5 from tkinter import OptionMenu
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6 from tkinter import _setit
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7 import copy
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8
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9 class DynOptionMenu(OptionMenu):
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10 """
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11 unlike OptionMenu, our kwargs can include highlightthickness
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12 """
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13 def __init__(self, master, variable, value, *values, **kwargs):
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14 #get a copy of kwargs before OptionMenu.__init__ munges them
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15 kwargsCopy=copy.copy(kwargs)
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16 if 'highlightthickness' in list(kwargs.keys()):
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17 del(kwargs['highlightthickness'])
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18 OptionMenu.__init__(self, master, variable, value, *values, **kwargs)
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19 self.config(highlightthickness=kwargsCopy.get('highlightthickness'))
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20 #self.menu=self['menu']
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21 self.variable=variable
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22 self.command=kwargs.get('command')
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23
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24 def SetMenu(self,valueList,value=None):
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25 """
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26 clear and reload the menu with a new set of options.
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27 valueList - list of new options
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28 value - initial value to set the optionmenu's menubutton to
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29 """
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30 self['menu'].delete(0,'end')
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31 for item in valueList:
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32 self['menu'].add_command(label=item,
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33 command=_setit(self.variable,item,self.command))
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34 if value:
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35 self.variable.set(value)