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　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。 . Prv8 Shell

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Current File : //usr/lib64/python2.7/toaiff.py

"""Convert "arbitrary" sound files to AIFF (Apple and SGI's audio format).

Input may be compressed.
Uncompressed file type may be AIFF, WAV, VOC, 8SVX, NeXT/Sun, and others.
An exception is raised if the file is not of a recognized type.
Returned filename is either the input filename or a temporary filename;
in the latter case the caller must ensure that it is removed.
Other temporary files used are removed by the function.
"""
from warnings import warnpy3k
warnpy3k("the toaiff module has been removed in Python 3.0", stacklevel=2)
del warnpy3k

import os
import tempfile
import pipes
import sndhdr

__all__ = ["error", "toaiff"]

table = {}

t = pipes.Template()
t.append('sox -t au - -t aiff -r 8000 -', '--')
table['au'] = t

# XXX The following is actually sub-optimal.
# XXX The HCOM sampling rate can be 22k, 22k/2, 22k/3 or 22k/4.
# XXX We must force the output sampling rate else the SGI won't play
# XXX files sampled at 5.5k or 7.333k; however this means that files
# XXX sampled at 11k are unnecessarily expanded.
# XXX Similar comments apply to some other file types.
t = pipes.Template()
t.append('sox -t hcom - -t aiff -r 22050 -', '--')
table['hcom'] = t

t = pipes.Template()
t.append('sox -t voc - -t aiff -r 11025 -', '--')
table['voc'] = t

t = pipes.Template()
t.append('sox -t wav - -t aiff -', '--')
table['wav'] = t

t = pipes.Template()
t.append('sox -t 8svx - -t aiff -r 16000 -', '--')
table['8svx'] = t

t = pipes.Template()
t.append('sox -t sndt - -t aiff -r 16000 -', '--')
table['sndt'] = t

t = pipes.Template()
t.append('sox -t sndr - -t aiff -r 16000 -', '--')
table['sndr'] = t

uncompress = pipes.Template()
uncompress.append('uncompress', '--')


class error(Exception):
    pass

def toaiff(filename):
    temps = []
    ret = None
    try:
        ret = _toaiff(filename, temps)
    finally:
        for temp in temps[:]:
            if temp != ret:
                try:
                    os.unlink(temp)
                except os.error:
                    pass
                temps.remove(temp)
    return ret

def _toaiff(filename, temps):
    if filename[-2:] == '.Z':
        (fd, fname) = tempfile.mkstemp()
        os.close(fd)
        temps.append(fname)
        sts = uncompress.copy(filename, fname)
        if sts:
            raise error, filename + ': uncompress failed'
    else:
        fname = filename
    try:
        ftype = sndhdr.whathdr(fname)
        if ftype:
            ftype = ftype[0] # All we're interested in
    except IOError, msg:
        if type(msg) == type(()) and len(msg) == 2 and \
                type(msg[0]) == type(0) and type(msg[1]) == type(''):
            msg = msg[1]
        if type(msg) != type(''):
            msg = repr(msg)
        raise error, filename + ': ' + msg
    if ftype == 'aiff':
        return fname
    if ftype is None or not ftype in table:
        raise error, '%s: unsupported audio file type %r' % (filename, ftype)
    (fd, temp) = tempfile.mkstemp()
    os.close(fd)
    temps.append(temp)
    sts = table[ftype].copy(fname, temp)
    if sts:
        raise error, filename + ': conversion to aiff failed'
    return temp

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