Librosa:TypeError: expected stri

[zoe_env@218 examples]$ python task2_cakir.py -p task2_cakir.defaults.yaml -s fnn
Traceback (most recent call last):
  File "task2_cakir.py", line 28, in <module>
    from dcase_framework.application_core import BinarySoundEventAppCore
  File "/home/zoe_env/DCASE2017-baseline-system-master-gpu/dcase_framework/__init__.py", line 3, in <module>
    from . import application_core
  File "/home/zoe_env/DCASE2017-baseline-system-master-gpu/dcase_framework/application_core.py", line 129, in <module>
    import sed_eval
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/sed_eval/__init__.py", line 5, in <module>
    from . import sound_event
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/sed_eval/sound_event.py", line 212, in <module>
    from . import util
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/sed_eval/util/__init__.py", line 41, in <module>
    from .event_list import *
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/sed_eval/util/event_list.py", line 7, in <module>
    import dcase_util
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/dcase_util/__init__.py", line 6, in <module>
    from . import containers
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/dcase_util/containers/__init__.py", line 949, in <module>
    from .audio import *
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/dcase_util/containers/audio.py", line 11, in <module>
    import librosa
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/librosa/__init__.py", line 12, in <module>
    from . import core
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/librosa/core/__init__.py", line 104, in <module>
    from .time_frequency import *  # pylint: disable=wildcard-import
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/librosa/core/time_frequency.py", line 10, in <module>
    from ..util.exceptions import ParameterError
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/librosa/util/__init__.py", line 67, in <module>
    from .utils import *  # pylint: disable=wildcard-import
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/librosa/util/utils.py", line 111, in <module>
    def valid_audio(y, mono=True):
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/librosa/cache.py", line 49, in wrapper
    if self.cachedir is not None and self.level >= level:
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/joblib/memory.py", line 847, in cachedir
    DeprecationWarning, stacklevel=2)
TypeError: expected string or buffer

百度发现，有人提出是librosa 在导入的时候，出现错误，import librosa进行验证

[zoe_env@218 examples]$ python
Python 2.7.15 |Anaconda, Inc.| (default, May  1 2018, 23:32:55)
[GCC 7.2.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import librosa
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/librosa/__init__.py", line 12, in <module>
    from . import core
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/librosa/core/__init__.py", line 104, in <module>
    from .time_frequency import *  # pylint: disable=wildcard-import
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/librosa/core/time_frequency.py", line 10, in <module>
    from ..util.exceptions import ParameterError
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/librosa/util/__init__.py", line 67, in <module>
    from .utils import *  # pylint: disable=wildcard-import
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/librosa/util/utils.py", line 111, in <module>
    def valid_audio(y, mono=True):
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/librosa/cache.py", line 49, in wrapper
    if self.cachedir is not None and self.level >= level:
  File "/home/zoe_env/anaconda2/lib/python2.7/site-packages/joblib/memory.py", line 847, in cachedir
    DeprecationWarning, stacklevel=2)
TypeError: expected string or buffer

验证，是由于librosa的问题
虽然不知道为什么，但是解决方法：joblib卸载0.12.0版本，安装0.11.0版本
pip uninstall joblib==0.12.0
pip install joblib==0.11.0
问题解决！