'sklearn ImportError: No module named _check_build

I'm trying to import sklearn, however when I attempt to do so I receive the following:

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-2-8fd979e02004> in <module>()
----> 1 import sklearn

C:\Users\Alpine\AppData\Local\Enthought\Canopy\User\sklearn\__init__.py in <module>()
     29     # process, as it may not be compiled yet
     30 else:
---> 31     from . import __check_build
     32     from .base import clone
     33 

C:\Users\Alpine\AppData\Local\Enthought\Canopy\User\sklearn\__check_build\__init__.py in <module>()
     44     from ._check_build import check_build
     45 except ImportError as e:
---> 46     raise_build_error(e)

C:\Users\Alpine\AppData\Local\Enthought\Canopy\User\sklearn\__check_build\__init__.py in raise_build_error(e)
     39 to build the package before using it: run `python setup.py install` or
     40 `make` in the source directory.
---> 41 %s""" % (e, local_dir, ''.join(dir_content).strip(), msg))
     42 
     43 try:

ImportError: No module named _check_build
___________________________________________________________________________
Contents of C:\Users\Alpine\AppData\Local\Enthought\Canopy\User\sklearn\__check_build:
setup.py                  setup.pyc                 _check_build.c
_check_build.pyx          __init__.py               __init__.pyc
___________________________________________________________________________
It seems that scikit-learn has not been built correctly.

If you have installed scikit-learn from source, please do not forget
to build the package before using it: run `python setup.py install` or
`make` in the source directory.

If you have used an installer, please check that it is suited for your
Python version, your operating system and your platform.

ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line string', (1, 2))

I'm fairly sure that scikit-learn has been correctly built as I managed to run python setup.py install without any incident. I did however try running python setup.py bdist_wininst -b doc/logos/scikit-learn-logo.bmp though was interrupted at error: cannot copy tree 'build\scripts.win-amd64-2.7': not a directory.

Might anybody have an idea on how to fix this?

python scikit-learn

Solution 1:^[1]

I have the same problem on Windows 10. I installed Anaconda with Python 3.7 and this installation shipped not only this problem. To solve run in anaconda prompt:

conda install scikit-learn

At least this worked for me

Solution 2:^[2]

OK, the following is work for me :)

sudo make
sudo python setup.py install

Finally, to test whether installation is ok:

nosetests --exe sklearn

Solution 3:^[3]

One way to avoid this error is to make sure you have all the needed dependencies installed. Under Ubuntu / Debian, you can accomplish this by running the following:

sudo apt-get build-dep python-sklearn

Solution 4:^[4]

This doesn't exactly fit your question as it doesn't involve Enthought distribution; however, I had a similar problem with a module using sklearn. The error was something like:

$ python -m somefile.py           // somefile.py uses sklearn at some point
Cannot import name __check_build

And after I installed scikit-learn (also,scipy and numpy-MKL) from this page the problem seemed to go away.

Solution 5:^[5]

Make sure you are executing the code with the latest python version. If you have multiple python version installed in your machine then just remove the first line "#!/usr/bin/python" and try running with full path of latest python version like "/usr/local/bin/python3.4 'filename'". If you have python version lower than 2.7 then try upgrading the version and installing the dependencies and then try the above method.

Solution 6:^[6]

In my case I had Python installed at two places, first by myself where I independently installed python and it was in a separate folder, second time by anaconda which installs python within its own folder. So every-time I called Scikit Learn it was refereeing to the first python folder which had some issues with scikit learn but when I removed old Python folder completely jupyter notebook was refereeing to the correct python folder and hence it worked.

Solution 7:^[7]

I am using Anaconda and this worked for me:

conda install scikit-learn

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Okroshiashvili
Solution 2	RyanLiu
Solution 3	Mark
Solution 4	icedwater
Solution 5	Krupesh Patel
Solution 6	anushreep2018
Solution 7	Josue

'sklearn ImportError: No module named _check_build

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