我遇到导入sklearn的问题。
我已经通过pip安装了包，但是python无法导入库。我在Windows 10环境中使用python 2.7。
from sklearn.tree import DecisionTreeClassifier, export_graphviz
我得到的错误如下：
Traceback (most recent call last):
File "classification.py", line 7, in <module>
from sklearn.tree import DecisionTreeClassifier, export_graphviz
File "C:\Python27\lib\site-packages\sklearn\__init__.py", line 56, in <module>
from . import __check_build
ImportError: cannot import name __check_build
我读过有人通过安装SciPy（scipy-0.19.1.tar.gz）找到解决方案，但当我尝试通过pip安装时，提示符返回此消息：
C:\Python27\Scripts>pip install scipy
Collecting scipy
Using cached scipy-0.19.1.tar.gz
Installing collected packages: scipy
Running setup.py install for scipy ... error
Complete output from command c:\python27\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\filipp~1\\appdata\\local\\temp\\pip-build-mhb0vd\\scipy\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record c:\users\filipp~1\appdata\local\temp\pip-jsdbd3-record\install-record.txt --single-version-externally-managed --compile:
Note: if you need reliable uninstall behavior, then install
with pip instead of using `setup.py install`:
- `pip install .` (from a git repo or downloaded source
release)
- `pip install scipy` (last SciPy release on PyPI)
lapack_opt_info:
lapack_mkl_info:
libraries mkl_rt not found in ['c:\\python27\\lib', 'C:\\', 'c:\\python27\\libs']
NOT AVAILABLE
openblas_lapack_info:
libraries openblas not found in ['c:\\python27\\lib', 'C:\\', 'c:\\python27\\libs']
NOT AVAILABLE
atlas_3_10_threads_info:
Setting PTATLAS=ATLAS
c:\python27\lib\site-packages\numpy\distutils\system_info.py:1051: UserWarning: Specified path C:\projects\numpy-wheels\windows-wheel-builder\atlas-builds\atlas-3.10.1-sse2-32\lib is invalid.
pre_dirs = system_info.get_paths(self, section, key)
<class 'numpy.distutils.system_info.atlas_3_10_threads_info'>
NOT AVAILABLE
atlas_3_10_info:
<class 'numpy.distutils.system_info.atlas_3_10_info'>
NOT AVAILABLE
atlas_threads_info:
Setting PTATLAS=ATLAS
<class 'numpy.distutils.system_info.atlas_threads_info'>
NOT AVAILABLE
atlas_info:
<class 'numpy.distutils.system_info.atlas_info'>
NOT AVAILABLE
c:\python27\lib\site-packages\numpy\distutils\system_info.py:572: UserWarning:
Atlas (http://math-atlas.sourceforge.net/) libraries not found.
Directories to search for the libraries can be specified in the
numpy/distutils/site.cfg file (section [atlas]) or by setting
the ATLAS environment variable.
self.calc_info()
lapack_info:
libraries lapack not found in ['c:\\python27\\lib', 'C:\\', 'c:\\python27\\libs']
NOT AVAILABLE
c:\python27\lib\site-packages\numpy\distutils\system_info.py:572: UserWarning:
Lapack (http://www.netlib.org/lapack/) libraries not found.
Directories to search for the libraries can be specified in the
numpy/distutils/site.cfg file (section [lapack]) or by setting
the LAPACK environment variable.
self.calc_info()
lapack_src_info:
NOT AVAILABLE
c:\python27\lib\site-packages\numpy\distutils\system_info.py:572: UserWarning:
Lapack (http://www.netlib.org/lapack/) sources not found.
Directories to search for the sources can be specified in the
numpy/distutils/site.cfg file (section [lapack_src]) or by setting
the LAPACK_SRC environment variable.
self.calc_info()
NOT AVAILABLE
Running from scipy source directory.
non-existing path in 'scipy\\integrate': 'quadpack.h'
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "c:\users\filipp~1\appdata\local\temp\pip-build-mhb0vd\scipy\setup.py", line 416, in <module>
setup_package()
File "c:\users\filipp~1\appdata\local\temp\pip-build-mhb0vd\scipy\setup.py", line 412, in setup_package
setup(**metadata)
File "c:\python27\lib\site-packages\numpy\distutils\core.py", line 135, in setup
config = configuration()
File "c:\users\filipp~1\appdata\local\temp\pip-build-mhb0vd\scipy\setup.py", line 336, in configuration
config.add_subpackage('scipy')
File "c:\python27\lib\site-packages\numpy\distutils\misc_util.py", line 1029, in add_subpackage
caller_level = 2)
File "c:\python27\lib\site-packages\numpy\distutils\misc_util.py", line 998, in get_subpackage
caller_level = caller_level + 1)
File "c:\python27\lib\site-packages\numpy\distutils\misc_util.py", line 935, in _get_configuration_from_setup_py
config = setup_module.configuration(*args)
File "scipy\setup.py", line 15, in configuration
config.add_subpackage('linalg')
File "c:\python27\lib\site-packages\numpy\distutils\misc_util.py", line 1029, in add_subpackage
caller_level = 2)
File "c:\python27\lib\site-packages\numpy\distutils\misc_util.py", line 998, in get_subpackage
caller_level = caller_level + 1)
File "c:\python27\lib\site-packages\numpy\distutils\misc_util.py", line 935, in _get_configuration_from_setup_py
config = setup_module.configuration(*args)
File "scipy\linalg\setup.py", line 20, in configuration
raise NotFoundError('no lapack/blas resources found')
numpy.distutils.system_info.NotFoundError: no lapack/blas resources found
----------------------------------------
Command "c:\python27\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\filipp~1\\appdata\\local\\temp\\pip-build-mhb0vd\\scipy\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record c:\users\filipp~1\appdata\local\temp\pip-jsdbd3-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in c:\users\filipp~1\appdata\local\temp\pip-build-mhb0vd\scipy\
感谢您的帮助，
菲利普。
答案 0 :(得分：1)
从here下载。然后使用cmd中的cd更改文件的路径。然后做pip install filename.whl。当然使用实际的文件名。
答案 1 :(得分：1)
打开终端（cmd）并在尝试导入sklearn之前尝试这些。
pip install -U scikit-learn
或
conda install scikit-learn
还要确保你有n and和scipy：
pip install numpy
pip install scipy
尝试这个1：
安装scipy后重启python shell！
尝试2：
从link安装numpy + mkl包，安装成功后重新启动python。
要安装whl文件，请使用：pip install some-package.whl
如果无效......
尝试这3：
为Python和PYTHONPATH环境变量设置系统路径变量
系统变量：将C：\ Python34添加到路径
用户变量：添加新:(名称）PYTHONPATH（值）C：\ Python34 \ Lib \ site-packages;
最后要尝试：
从here
安装anaconda然后运行：conda install scikit-learn