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 : //usr/lib64/python2.7/lib2to3/fixes/fix_apply.py
# Copyright 2006 Google, Inc. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.

"""Fixer for apply().

This converts apply(func, v, k) into (func)(*v, **k)."""

# Local imports
from .. import pytree
from ..pgen2 import token
from .. import fixer_base
from ..fixer_util import Call, Comma, parenthesize

class FixApply(fixer_base.BaseFix):
    BM_compatible = True

    PATTERN = """
    power< 'apply'
        trailer<
            '('
            arglist<
                (not argument<NAME '=' any>) func=any ','
                (not argument<NAME '=' any>) args=any [','
                (not argument<NAME '=' any>) kwds=any] [',']
            >
            ')'
        >
    >
    """

    def transform(self, node, results):
        syms = self.syms
        assert results
        func = results["func"]
        args = results["args"]
        kwds = results.get("kwds")
        # I feel like we should be able to express this logic in the
        # PATTERN above but I don't know how to do it so...
        if args:
            if args.type == self.syms.star_expr:
                return  # Make no change.
            if (args.type == self.syms.argument and
                args.children[0].value == '**'):
                return  # Make no change.
        if kwds and (kwds.type == self.syms.argument and
                     kwds.children[0].value == '**'):
            return  # Make no change.
        prefix = node.prefix
        func = func.clone()
        if (func.type not in (token.NAME, syms.atom) and
            (func.type != syms.power or
             func.children[-2].type == token.DOUBLESTAR)):
            # Need to parenthesize
            func = parenthesize(func)
        func.prefix = ""
        args = args.clone()
        args.prefix = ""
        if kwds is not None:
            kwds = kwds.clone()
            kwds.prefix = ""
        l_newargs = [pytree.Leaf(token.STAR, u"*"), args]
        if kwds is not None:
            l_newargs.extend([Comma(),
                              pytree.Leaf(token.DOUBLESTAR, u"**"),
                              kwds])
            l_newargs[-2].prefix = u" " # that's the ** token
        # XXX Sometimes we could be cleverer, e.g. apply(f, (x, y) + t)
        # can be translated into f(x, y, *t) instead of f(*(x, y) + t)
        #new = pytree.Node(syms.power, (func, ArgList(l_newargs)))
        return Call(func, l_newargs, prefix=prefix)

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