Error: 'xslt-config' is not recognized as an internal or external command
make sure the development packages of libxml2 and libxslt are installed

If you are getting this message when trying to pip install lxml or install lxml via Pycharm project interpreter, here the solution https://www.bikrammann.com/error-microsoft-visual-c-10-0-is-required-unable-to-find-vcvarsall-bat/

I got this error message ” Error: Microsoft visual C++ 10.0 is required (Unable to find vcvarsall.bat) ” when I was trying to install lxml package on windows 10 using the command

pip install lxml

Here is the solution to fix this problem

Step 1 – Upgrade pip, setuptools and virtualenv

python -m pip install -U pip
pip install -U setuptools
pip install -U virtualenv

Step 2 –  Download the latest version of lxml MS Windows installer from this link https://pypi.python.org/pypi/lxml/. Then move the downloaded file
lxml-3.6.0.win32-py3.2.exe  to c:\python35\Scripts ( or where your python package is installed ).
Then use easy_install to install the windows installer

easy_install lxml-3.6.0.win32-py3.2.exe

Step 3 – Now you should be able to install the lxml package using easy_install

easy_install lxml

If everything works you will see a message similar to this

Installed python\lib\site-packages\lxml-3.6.0-py3.5-win32.egg
Processing dependencies for lxml=3.6.0
Finished processing dependencies for lxml=3.6.0