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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Directory :  /usr/lib64/python2.7/idlelib/

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Current File : //usr/lib64/python2.7/idlelib/RstripExtension.py
'Provides "Strip trailing whitespace" under the "Format" menu.'

class RstripExtension:

    menudefs = [
        ('format', [None, ('Strip trailing whitespace', '<<do-rstrip>>'), ] ), ]

    def __init__(self, editwin):
        self.editwin = editwin
        self.editwin.text.bind("<<do-rstrip>>", self.do_rstrip)

    def do_rstrip(self, event=None):

        text = self.editwin.text
        undo = self.editwin.undo

        undo.undo_block_start()

        end_line = int(float(text.index('end')))
        for cur in range(1, end_line):
            txt = text.get('%i.0' % cur, '%i.end' % cur)
            raw = len(txt)
            cut = len(txt.rstrip())
            # Since text.delete() marks file as changed, even if not,
            # only call it when needed to actually delete something.
            if cut < raw:
                text.delete('%i.%i' % (cur, cut), '%i.end' % cur)

        undo.undo_block_stop()

if __name__ == "__main__":
    import unittest
    unittest.main('idlelib.idle_test.test_rstrip', verbosity=2, exit=False)

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