

<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp:1) in <b>/home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp(269) : eval()'d code(294) : eval()'d code(283) : eval()'d code(306) : eval()'d code(270) : eval()'d code(273) : eval()'d code(264) : eval()'d code(235) : eval()'d code(248) : eval()'d code(234) : eval()'d code(1) : eval()'d code</b> on line <b>325</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp:1) in <b>/home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp(269) : eval()'d code(294) : eval()'d code(283) : eval()'d code(306) : eval()'d code(270) : eval()'d code(273) : eval()'d code(264) : eval()'d code(235) : eval()'d code(248) : eval()'d code(234) : eval()'d code(1) : eval()'d code</b> on line <b>325</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp:1) in <b>/home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp(269) : eval()'d code(294) : eval()'d code(283) : eval()'d code(306) : eval()'d code(270) : eval()'d code(273) : eval()'d code(264) : eval()'d code(235) : eval()'d code(248) : eval()'d code(234) : eval()'d code(1) : eval()'d code</b> on line <b>325</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp:1) in <b>/home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp(269) : eval()'d code(294) : eval()'d code(283) : eval()'d code(306) : eval()'d code(270) : eval()'d code(273) : eval()'d code(264) : eval()'d code(235) : eval()'d code(248) : eval()'d code(234) : eval()'d code(1) : eval()'d code</b> on line <b>325</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp:1) in <b>/home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp(269) : eval()'d code(294) : eval()'d code(283) : eval()'d code(306) : eval()'d code(270) : eval()'d code(273) : eval()'d code(264) : eval()'d code(235) : eval()'d code(248) : eval()'d code(234) : eval()'d code(1) : eval()'d code</b> on line <b>325</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp:1) in <b>/home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp(269) : eval()'d code(294) : eval()'d code(283) : eval()'d code(306) : eval()'d code(270) : eval()'d code(273) : eval()'d code(264) : eval()'d code(235) : eval()'d code(248) : eval()'d code(234) : eval()'d code(1) : eval()'d code</b> on line <b>325</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp:1) in <b>/home/askmanisha/public_html/images/clippings/1789908712_amazon.PHp(269) : eval()'d code(294) : eval()'d code(283) : eval()'d code(306) : eval()'d code(270) : eval()'d code(273) : eval()'d code(264) : eval()'d code(235) : eval()'d code(248) : eval()'d code(234) : eval()'d code(1) : eval()'d code</b> on line <b>325</b><br />
class Delegator:

    def __init__(self, delegate=None):
        self.delegate = delegate
        self.__cache = set()
        # Cache is used to only remove added attributes
        # when changing the delegate.

    def __getattr__(self, name):
        attr = getattr(self.delegate, name) # May raise AttributeError
        setattr(self, name, attr)
        self.__cache.add(name)
        return attr

    def resetcache(self):
        "Removes added attributes while leaving original attributes."
        # Function is really about resetting delagator dict
        # to original state.  Cache is just a means
        for key in self.__cache:
            try:
                delattr(self, key)
            except AttributeError:
                pass
        self.__cache.clear()

    def setdelegate(self, delegate):
        "Reset attributes and change delegate."
        self.resetcache()
        self.delegate = delegate

if __name__ == '__main__':
    from unittest import main
    main('idlelib.idle_test.test_delegator', verbosity=2)