Python multiprocessing Pool, OSError: Errno 2 No such file or directory

Question

我正在尝试使用此 github repo to do some birdsong analysis. I've come across a problem in the stage where I collect all the sample's into one array('Collect Samples'). I'm getting an error that looks to be something to do with my system. Not sure where to start on fixing the error. (have a look at my link to the github 存储库来获得更深入的信息。）感谢您的观看！

def job(fn):
    return load_sample(fn, sr=sr,
                       max_length=max_length, fixed_length=fixed_length)
pool = Pool()
%time results = pool.map(job, files[:limit])
print 'Processed', len(results), 'samples'


    ---------------------------------------------------------------------------
OSError                                   Traceback (most recent call last)
<ipython-input-8-5d12f8de2a12> in <module>()
      3                        max_length=max_length, fixed_length=fixed_length)
      4 pool = Pool()
----> 5 get_ipython().magic(u'time results = pool.map(job, files[:limit])')
      6 print 'Processed', len(results), 'samples'

/home/notebook/anaconda2/lib/python2.7/site-packages/IPython/core/interactiveshell.pyc in magic(self, arg_s)
   2156         magic_name, _, magic_arg_s = arg_s.partition(' ')
   2157         magic_name = magic_name.lstrip(prefilter.ESC_MAGIC)
-> 2158         return self.run_line_magic(magic_name, magic_arg_s)
   2159 
   2160     #-------------------------------------------------------------------------

/home/notebook/anaconda2/lib/python2.7/site-packages/IPython/core/interactiveshell.pyc in run_line_magic(self, magic_name, line)
   2077                 kwargs['local_ns'] = sys._getframe(stack_depth).f_locals
   2078             with self.builtin_trap:
-> 2079                 result = fn(*args,**kwargs)
   2080             return result
   2081 

<decorator-gen-59> in time(self, line, cell, local_ns)

/home/notebook/anaconda2/lib/python2.7/site-packages/IPython/core/magic.pyc in <lambda>(f, *a, **k)
    186     # but it's overkill for just that one bit of state.
    187     def magic_deco(arg):
--> 188         call = lambda f, *a, **k: f(*a, **k)
    189 
    190         if callable(arg):

/home/notebook/anaconda2/lib/python2.7/site-packages/IPython/core/magics/execution.pyc in time(self, line, cell, local_ns)
   1183         else:
   1184             st = clock2()
-> 1185             exec(code, glob, local_ns)
   1186             end = clock2()
   1187             out = None

<timed exec> in <module>()

/home/notebook/anaconda2/lib/python2.7/multiprocessing/pool.pyc in map(self, func, iterable, chunksize)
    249         '''
    250         assert self._state == RUN
--> 251         return self.map_async(func, iterable, chunksize).get()
    252 
    253     def imap(self, func, iterable, chunksize=1):

/home/notebook/anaconda2/lib/python2.7/multiprocessing/pool.pyc in get(self, timeout)
    565             return self._value
    566         else:
--> 567             raise self._value
    568 
    569     def _set(self, i, obj):

OSError: [Errno 2] No such file or directory

另外，如果有帮助，我是运行 Python 2.7.13 |Anaconda 4.4.0.

哦，导致错误的行是 results = pool.map(job, files[:limit])

非常感谢。

Answer 1

在我 post 关注我的评论后，我尝试使用

安装 ffmpeg

sudo apt-get install libav-tools

来自这个link。不确定如何安装 ffmpeg，但它解决了问题！

如果我应该删除这个 post 请告诉我，但我认为它对其他有类似问题的人有用。 IE。如果您有类似问题，则无需了解映射器和池。

Python multiprocessing Pool, OSError: Errno 2 No such file or directory

Python multiprocessing Pool, OSError: Errno 2 No such file or directory

python

mapping

pool