how to install lxml on your local machine

install-lxml

I had a lot of trouble installing lxml - the following steps might help you.

First, install the latest version of XCode. You'll need to do it through the App Store.
https://developer.apple.com/xcode/

Once it's installed, open XCode and accept the terms of use. 
Go to Preferences > Downloads.
Under "Components", install "Command Line Tools". 
Quit XCode.

Go to the command line. Try:
pip install lxml

If you get clang errors, try the following commands:
export CFLAGS=-Qunused-arguments
export CPPFLAGS=-Qunused-arguments

And then
pip install lxml

If that still doesn't work, and you have the Apple-installed version of Python installed, try this:
sudo -E pip install lxml