pip - ValueError ['path'] failed building wheel for python-crfsuite -

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i trying install python-crfsuite using command:

pip install python-crfsuite

before use 

set vs90comntools=%vs140comntools%

since using visual studio 2015. after running installation command following error:

file "c:\python34\lib\distutils\msvc9compiler.py", line 287, in query_vcvarsall       raise valueerror(str(list(result.keys())))   valueerror: ['path']    ----------------------------------------   failed building wheel python-crfsuite

if has faced same problem or has installed crfsuite on windows has knowledge please me solve error

i tried workaround. installed mingw link http://sourceforge.net/projects/mingw/files , used link http://versioneye.com/python/python-crfsuite/0.8.1 install pycrfsuite using command :
pip install https://pypi.python.org/packages/source/p/python-crfsuite/python-crfsuite-0.8.1.‌​tar.gz
and worked!! don't understand why though


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