librosa是处理音频库里的opencv,使用python脚本研究音频，先安装三方库librosa。

如下通过清华镜像源安装librosa；

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple librosa

D:\D00_Python3\D00A2_python3.7.3\install>pip install -i https://pypi.tuna.tsinghua.edu.cn/simple librosa

Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Processing c:\users\administrator\appdata\local\pip\cache\wheels\6e\d3\47\7582e7e63ee9127f4773adeb8dcd8490771c063e2607354ba0\librosa-0.7.2-py3-none-any.whl
Requirement already satisfied: numba>=0.43.0 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from librosa) (0.50.0)
Requirement already satisfied: joblib>=0.12 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from librosa) (0.15.1)
Requirement already satisfied: resampy>=0.2.2 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from librosa) (0.2.2)
Requirement already satisfied: numpy>=1.15.0 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from librosa) (1.18.5)
Requirement already satisfied: audioread>=2.0.0 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from librosa) (2.1.8)
Requirement already satisfied: scipy>=1.0.0 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from librosa) (1.4.1)
Requirement already satisfied: soundfile>=0.9.0 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from librosa) (0.10.3.post1)
Requirement already satisfied: scikit-learn!=0.19.0,>=0.14.0 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from librosa) (0.23.1)
Requirement already satisfied: six>=1.3 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from librosa) (1.15.0)
Requirement already satisfied: decorator>=3.0.0 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from librosa) (4.4.2)
Requirement already satisfied: setuptools in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from numba>=0.43.0->librosa) (47.1.1)
Requirement already satisfied: llvmlite<0.34,>=0.33.0.dev0 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from numba>=0.43.0->librosa) (0.33.0)
Requirement already satisfied: cffi>=1.0 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from soundfile>=0.9.0->librosa) (1.14.0)
Requirement already satisfied: threadpoolctl>=2.0.0 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from scikit-learn!=0.19.0,>=0.14.0->librosa) (2.1.0)
Requirement already satisfied: pycparser in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from cffi>=1.0->soundfile>=0.9.0->librosa) (2.20)
Installing collected packages: librosa
Successfully installed librosa-0.7.2

D:\D00_Python3\D00A2_python3.7.3\install>

pip list查看三方包：

D:\D00_Python3\D00A2_python3.7.3\install>pip listPackage Version-------------------- ------------absl-py 0.9.0astor 0.8.1audioread 2.1.8cffi 1.14.0decorator 4.4.2defusedxml 0.6.0gast 0.3.3google-pasta 0.2.0grpcio 1.29.0h5py 2.10.0importlib-metadata 1.6.1joblib 0.15.1Keras-Applications 1.0.8Keras-Preprocessing 1.1.2librosa 0.7.2llvmlite 0.33.0Markdown 3.2.2networkx 2.2numba 0.50.0numpy 1.18.5pip 20.1.1protobuf 3.12.2pycparser 2.20resampy 0.2.2scikit-learn 0.23.1scipy 1.4.1setuptools 47.1.1six 1.15.0SoundFile 0.10.3.post1tensorboard 1.14.0tensorflow 1.14.0tensorflow-estimator 1.14.0termcolor 1.1.0threadpoolctl 2.1.0Werkzeug 1.0.1wheel 0.34.2wrapt 1.12.1zipp 3.1.0 D:\D00_Python3\D00A2_python3.7.3\install>

如上

librosa ----0.7.2

numba-----0.50.0

下面使用librosa，报的是numba的错误！

D:\D00_Python3\D00A2_python3.7.3\install>python -c "import librosa"Traceback (most recent call last): File "<string>", line 1, in <module> File "D:\D00_Python3\D00A2_python3.7.3\install\lib\site-packages\librosa\__init__.py", line 12, in <module> from . import core File "D:\D00_Python3\D00A2_python3.7.3\install\lib\site-packages\librosa\core\__init__.py", line 125, in <module> from .time_frequency import * # pylint: disable=wildcard-import File "D:\D00_Python3\D00A2_python3.7.3\install\lib\site-packages\librosa\core\time_frequency.py", line 11, in <module> from ..util.exceptions import ParameterError File "D:\D00_Python3\D00A2_python3.7.3\install\lib\site-packages\librosa\util\__init__.py", line 77, in <module> from .utils import * # pylint: disable=wildcard-import File "D:\D00_Python3\D00A2_python3.7.3\install\lib\site-packages\librosa\util\utils.py", line 15, in <module> from .decorators import deprecated File "D:\D00_Python3\D00A2_python3.7.3\install\lib\site-packages\librosa\util\decorators.py", line 9, in <module> from numba.decorators import jit as optional_jitModuleNotFoundError: No module named 'numba.decorators' D:\D00_Python3\D00A2_python3.7.3\install>

解决办法：

卸载numba后，重新安装降版本的numba，安装numba==0.48.0

pip uninstallnumba

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple numba==0.48.0

python -c "import librosa;print(librosa.__version__)"

可以看到成功安装了正确可使用的librosa库！

D:\D00_Python3\D00A2_python3.7.3\install>pip uninstall numbaFound existing installation: numba 0.50.0Uninstalling numba-0.50.0: Would remove: d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages\numba-0.50.0.dist-info\* d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages\numba\* d:\d00_python3\d00a2_python3.7.3\install\scripts\numba d:\d00_python3\d00a2_python3.7.3\install\scripts\pyccProceed (y/n)? y Successfully uninstalled numba-0.50.0 D:\D00_Python3\D00A2_python3.7.3\install>pip install -i https://pypi.tuna.tsinghua.edu.cn/simple numba==0.48.0Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simpleCollecting numba==0.48.0 Downloading https://pypi.tuna.tsinghua.edu.cn/packages/f5/ca/9e47464d388c3372454639d1739fa21605862c8815d53279e1216b5694e1/numba-0.48.0-cp37-cp37m-win_amd64.whl (2.1 MB)|█████████████████████████████▌ | 1.9 MB 2.2 MB/s eta 0:00:01 |██████████████████████████████ | 2.0 MB 2.2 MB/s eta 0:00:01 |██████████████████████████████▌ | 2.0 MB 2.2 MB/s eta 0:00:0 |███████████████████████████████ | 2.0 MB 2.2 MB/s eta 0:00:0 |███████████████████████████████▌| 2.1 MB 2.2 MB/s eta 0:00: |████████████████████████████████| 2.1 MB 2.2 MB/sRequirement already satisfied: setuptools in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from numba==0.48.0) (47.1.1)Requirement already satisfied: numpy>=1.15 in d:\d00_python3\d00a2_python3.7.3\install\lib\site-packages (from numba==0.48.0) (1.18.5)Collecting llvmlite<0.32.0,>=0.31.0dev0 Downloading https://pypi.tuna.tsinghua.edu.cn/packages/1d/83/cd2843726a6316e372822e9e42cd0083b6d1d98d89d53880e7e67d5eec68/llvmlite-0.31.0-cp37-cp37m-win_amd64.whl (13.6 MB)████████████████████████████▌ | 12.1 MB 3.3 MB/s eta 0:00:01 |█████████████████████████████ | 12.5 MB 3.3 MB/s eta 0:00:01 |██████████████████████████████ | 12.9 MB 3.3 MB/s eta 0:00:0 |██████████████████████████████▌ | 13.1 MB 3.3 MB/s eta 0:00: |████████████████████████████████| 13.6 MB 434 kB/sInstalling collected packages: llvmlite, numba Attempting uninstall: llvmlite Found existing installation: llvmlite 0.33.0 Uninstalling llvmlite-0.33.0: Successfully uninstalled llvmlite-0.33.0Successfully installed llvmlite-0.31.0 numba-0.48.0 D:\D00_Python3\D00A2_python3.7.3\install>python -c "import librosa;print(librosa.__version__) "0.7.2

总结

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