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/hotshot/

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Current File : //usr/lib64/python2.7/hotshot/stats.py
"""Statistics analyzer for HotShot."""

import profile
import pstats

import hotshot.log

from hotshot.log import ENTER, EXIT


def load(filename):
    return StatsLoader(filename).load()


class StatsLoader:
    def __init__(self, logfn):
        self._logfn = logfn
        self._code = {}
        self._stack = []
        self.pop_frame = self._stack.pop

    def load(self):
        # The timer selected by the profiler should never be used, so make
        # sure it doesn't work:
        p = Profile()
        p.get_time = _brokentimer
        log = hotshot.log.LogReader(self._logfn)
        taccum = 0
        for event in log:
            what, (filename, lineno, funcname), tdelta = event
            if tdelta > 0:
                taccum += tdelta

            # We multiply taccum to convert from the microseconds we
            # have to the seconds that the profile/pstats module work
            # with; this allows the numbers to have some basis in
            # reality (ignoring calibration issues for now).

            if what == ENTER:
                frame = self.new_frame(filename, lineno, funcname)
                p.trace_dispatch_call(frame, taccum * .000001)
                taccum = 0

            elif what == EXIT:
                frame = self.pop_frame()
                p.trace_dispatch_return(frame, taccum * .000001)
                taccum = 0

            # no further work for line events

        assert not self._stack
        return pstats.Stats(p)

    def new_frame(self, *args):
        # args must be filename, firstlineno, funcname
        # our code objects are cached since we don't need to create
        # new ones every time
        try:
            code = self._code[args]
        except KeyError:
            code = FakeCode(*args)
            self._code[args] = code
        # frame objects are create fresh, since the back pointer will
        # vary considerably
        if self._stack:
            back = self._stack[-1]
        else:
            back = None
        frame = FakeFrame(code, back)
        self._stack.append(frame)
        return frame


class Profile(profile.Profile):
    def simulate_cmd_complete(self):
        pass


class FakeCode:
    def __init__(self, filename, firstlineno, funcname):
        self.co_filename = filename
        self.co_firstlineno = firstlineno
        self.co_name = self.__name__ = funcname


class FakeFrame:
    def __init__(self, code, back):
        self.f_back = back
        self.f_code = code


def _brokentimer():
    raise RuntimeError, "this timer should not be called"

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