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 : //lib64/python2.7/Tools/scripts/byteyears.py
#! /usr/bin/python2.7

# Print the product of age and size of each file, in suitable units.
#
# Usage: byteyears [ -a | -m | -c ] file ...
#
# Options -[amc] select atime, mtime (default) or ctime as age.

import sys, os, time
from stat import *

def main():

    # Use lstat() to stat files if it exists, else stat()
    try:
        statfunc = os.lstat
    except AttributeError:
        statfunc = os.stat

    # Parse options
    if sys.argv[1] == '-m':
        itime = ST_MTIME
        del sys.argv[1]
    elif sys.argv[1] == '-c':
        itime = ST_CTIME
        del sys.argv[1]
    elif sys.argv[1] == '-a':
        itime = ST_CTIME
        del sys.argv[1]
    else:
        itime = ST_MTIME

    secs_per_year = 365.0 * 24.0 * 3600.0   # Scale factor
    now = time.time()                       # Current time, for age computations
    status = 0                              # Exit status, set to 1 on errors

    # Compute max file name length
    maxlen = 1
    for filename in sys.argv[1:]:
        maxlen = max(maxlen, len(filename))

    # Process each argument in turn
    for filename in sys.argv[1:]:
        try:
            st = statfunc(filename)
        except os.error, msg:
            sys.stderr.write("can't stat %r: %r\n" % (filename, msg))
            status = 1
            st = ()
        if st:
            anytime = st[itime]
            size = st[ST_SIZE]
            age = now - anytime
            byteyears = float(size) * float(age) / secs_per_year
            print filename.ljust(maxlen),
            print repr(int(byteyears)).rjust(8)

    sys.exit(status)

if __name__ == '__main__':
    main()

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