import statsmodels.api as sm 时 ImportError: DLL load failed while importing

import statsmodels.api as sm 时报错如下：

解决过程曲折，大致就是 scipy 版本与 statsmodels 的有些方法不兼容，scipy==1.6.0后，问题解决了：


(base) C:\Users\Administrator>pip uninstall statsmodels
Found existing installation: statsmodels 0.11.1
Uninstalling statsmodels-0.11.1:Would remove:d:\python\anaconda3\lib\site-packages\statsmodels-0.11.1.dist-info\*d:\python\anaconda3\lib\site-packages\statsmodels\*
Proceed (y/n)? ySuccessfully uninstalled statsmodels-0.11.1(base) C:\Users\Administrator>pip install statsmodels==0.12.0 -i http://pypi.douban.com/simple --trusted-host pypi.douban.com
Looking in indexes: http://pypi.douban.com/simple
Collecting statsmodels==0.12.0Downloading http://pypi.doubanio.com/packages/37/22/959fdc710b6b384ad21a876130000557163978880dc50e16ba5d4ce35c18/statsmodels-0.12.0-cp38-none-win_amd64.whl (9.2 MB)|████████████████████████████████| 9.2 MB 6.4 MB/s
Requirement already satisfied: scipy>=1.1 in d:\python\anaconda3\lib\site-packages (from statsmodels==0.12.0) (1.5.0)
Requirement already satisfied: numpy>=1.15 in d:\python\anaconda3\lib\site-packages (from statsmodels==0.12.0) (1.20.3)
Requirement already satisfied: pandas>=0.21 in d:\python\anaconda3\lib\site-packages (from statsmodels==0.12.0) (1.3.4)
Requirement already satisfied: patsy>=0.5 in d:\python\anaconda3\lib\site-packages (from statsmodels==0.12.0) (0.5.1)
Requirement already satisfied: python-dateutil>=2.7.3 in d:\python\anaconda3\lib\site-packages (from pandas>=0.21->statsmodels==0.12.0) (2.8.1)
Requirement already satisfied: pytz>=2017.3 in d:\python\anaconda3\lib\site-packages (from pandas>=0.21->statsmodels==0.12.0) (2020.1)
Requirement already satisfied: six in d:\python\anaconda3\lib\site-packages (from patsy>=0.5->statsmodels==0.12.0) (1.15.0)
Installing collected packages: statsmodels
Successfully installed statsmodels-0.12.0(base) C:\Users\Administrator>pip show scipy
Name: scipy
Version: 1.5.0
Summary: SciPy: Scientific Library for Python
Home-page: https://www.scipy.org
Author: None
Author-email: None
License: BSD
Location: d:\python\anaconda3\lib\site-packages
Requires: numpy
Required-by: -tatsmodels, xgboost, wxgl, sweetviz, stldecompose, statsmodels, sesd, seaborn, scikit-learn, scikit-image, resampy, pyod, mplsoccer, missingno, lightgbm, librosa, imgaug, imbalanced-learn, gensim, filterpy, factor-analyzer, combo, category-encoders, catboost, bayesian-optimization, albumentations(base) C:\Users\Administrator>pip uninstall scipy
Found existing installation: scipy 1.5.0
Uninstalling scipy-1.5.0:Would remove:d:\python\anaconda3\lib\site-packages\scipy-1.5.0.dist-info\*d:\python\anaconda3\lib\site-packages\scipy\*
Proceed (y/n)? ySuccessfully uninstalled scipy-1.5.0
ERROR: Exception:
Traceback (most recent call last):File "D:\python\Anaconda3\lib\site-packages\pip\_internal\cli\base_command.py", line 188, in _mainstatus = self.run(options, args)File "D:\python\Anaconda3\lib\site-packages\pip\_internal\commands\uninstall.py", line 89, in rununinstall_pathset.commit()File "D:\python\Anaconda3\lib\site-packages\pip\_internal\req\req_uninstall.py", line 450, in commitself._moved_paths.commit()File "D:\python\Anaconda3\lib\site-packages\pip\_internal\req\req_uninstall.py", line 290, in commitsave_dir.cleanup()File "D:\python\Anaconda3\lib\site-packages\pip\_internal\utils\temp_dir.py", line 196, in cleanuprmtree(self._path)File "D:\python\Anaconda3\lib\site-packages\pip\_vendor\retrying.py", line 49, in wrapped_freturn Retrying(*dargs, **dkw).call(f, *args, **kw)File "D:\python\Anaconda3\lib\site-packages\pip\_vendor\retrying.py", line 212, in callraise attempt.get()File "D:\python\Anaconda3\lib\site-packages\pip\_vendor\retrying.py", line 247, in getsix.reraise(self.value[0], self.value[1], self.value[2])File "D:\python\Anaconda3\lib\site-packages\pip\_vendor\six.py", line 703, in reraiseraise valueFile "D:\python\Anaconda3\lib\site-packages\pip\_vendor\retrying.py", line 200, in callattempt = Attempt(fn(*args, **kwargs), attempt_number, False)File "D:\python\Anaconda3\lib\site-packages\pip\_internal\utils\misc.py", line 135, in rmtreeshutil.rmtree(dir, ignore_errors=ignore_errors,File "D:\python\Anaconda3\lib\shutil.py", line 737, in rmtreereturn _rmtree_unsafe(path, onerror)File "D:\python\Anaconda3\lib\shutil.py", line 610, in _rmtree_unsafe_rmtree_unsafe(fullname, onerror)File "D:\python\Anaconda3\lib\shutil.py", line 610, in _rmtree_unsafe_rmtree_unsafe(fullname, onerror)File "D:\python\Anaconda3\lib\shutil.py", line 615, in _rmtree_unsafeonerror(os.unlink, fullname, sys.exc_info())File "D:\python\Anaconda3\lib\shutil.py", line 613, in _rmtree_unsafeos.unlink(fullname)
PermissionError: [WinError 5] 拒绝访问。: 'D:\\python\\Anaconda3\\Lib\\site-packages\\~cipy\\fft\\_pocketfft\\pypocketfft.cp38-win_amd64.pyd'(base) C:\Users\Administrator>pip install scipy --user -i http://pypi.douban.com/simple --trusted-host pypi.douban.com
Looking in indexes: http://pypi.douban.com/simple
Collecting scipyDownloading http://pypi.doubanio.com/packages/56/a3/591dbf477c35f173279afa7b9ba8e13d9c7c3d001e09aebbf6100aae33a8/scipy-1.8.0-cp38-cp38-win_amd64.whl (36.9 MB)|████████████████████████████████| 36.9 MB 3.3 MB/s
Requirement already satisfied: numpy<1.25.0,>=1.17.3 in d:\python\anaconda3\lib\site-packages (from scipy) (1.20.3)
Installing collected packages: scipy
Successfully installed scipy-1.8.0(base) C:\Users\Administrator>python
Python 3.8.3 (default, Jul  2 2020, 17:30:36) [MSC v.1916 64 bit (AMD64)] :: Anaconda, Inc. on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import statsmodels.api as sm
Traceback (most recent call last):File "<stdin>", line 1, in <module>File "D:\python\Anaconda3\lib\site-packages\statsmodels\api.py", line 27, in <module>from .tsa import api as tsaFile "D:\python\Anaconda3\lib\site-packages\statsmodels\tsa\api.py", line 31, in <module>from .filters import api as filtersFile "D:\python\Anaconda3\lib\site-packages\statsmodels\tsa\filters\api.py", line 6, in <module>from .filtertools import miso_lfilter, convolution_filter, recursive_filterFile "D:\python\Anaconda3\lib\site-packages\statsmodels\tsa\filters\filtertools.py", line 18, in <module>from scipy.signal.signaltools import _centered as trim_centered
ImportError: cannot import name '_centered' from 'scipy.signal.signaltools' (C:\Users\Administrator\AppData\Roaming\Python\Python38\site-packages\scipy\signal\signaltools.py)
>>> exit
Use exit() or Ctrl-Z plus Return to exit
>>> exit()(base) C:\Users\Administrator>pip install scipy==1.6 --user -i http://pypi.douban.com/simple --trusted-host pypi.douban.co
Looking in indexes: http://pypi.douban.com/simple
WARNING: The repository located at pypi.douban.com is not a trusted or secure host and is being ignored. If this repository is available via HTTPS we recommend you use HTTPS instead, otherwise you may silence this warning and allow it anyway with '--trusted-host pypi.douban.com'.
ERROR: Could not find a version that satisfies the requirement scipy==1.6 (from versions: none)
ERROR: No matching distribution found for scipy==1.6(base) C:\Users\Administrator>pip install scipy==1.6.0 --user -i http://pypi.douban.com/simple --trusted-host pypi.douban.com
Looking in indexes: http://pypi.douban.com/simple
Collecting scipy==1.6.0Downloading http://pypi.doubanio.com/packages/a1/05/9b41f6a969a0d6ad36732bdd3c936434228dafaa829932be5a51574e4958/scipy-1.6.0-cp38-cp38-win_amd64.whl (32.7 MB)|████████████████████████████████| 32.7 MB 3.2 MB/s
Requirement already satisfied: numpy>=1.16.5 in d:\python\anaconda3\lib\site-packages (from scipy==1.6.0) (1.20.3)
Installing collected packages: scipyAttempting uninstall: scipyFound existing installation: scipy 1.8.0Uninstalling scipy-1.8.0:Successfully uninstalled scipy-1.8.0
Successfully installed scipy-1.6.0(base) C:\Users\Administrator>python
Python 3.8.3 (default, Jul  2 2020, 17:30:36) [MSC v.1916 64 bit (AMD64)] :: Anaconda, Inc. on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import statsmodels.api as sm
>>>

解决后，重启jupyter notebook，进入可以正常使用。

print("：".join(["CSDN叶庭云", "https://yetingyun.blog.csdn.net/"]))

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import statsmodels.api as sm 时 ImportError: DLL load failed while importing _arpack: 找不到指定的程序。

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