While installing Scrapy (Python Crawl) you may get errors like below
1. src/lxml/lxml.etree.c:16:20: fatal error: Python.h: No such file or directory
#include "Python.h"
2. Setup script exited with error: command 'gcc' failed with exit status 1
3. fatal error: openssl/aes.h: No such file or directory
...
