src/lxml/etree_defs.h:9:31: fatal error: libxml/xmlversion.h: No such file or directory

Question

1. I am running the following comand for installing the packages in that file \" pip install -r requirements.txt --download-cache=~/tmp/pip-cache\".

Answer 1

without sudo rights you can install lxml with:

STATIC_DEPS=true pip install lxml

As mentioned in the lxml documentation