You are using an yum based OS, not an apt based OS. Forget any commands that involve apt or a variation thereof.
Skip the steps you've already done:
yum install python
yum install python-pip
yum install libxml2-python
pip install Scrapy
As for libxml2-python, keep in mind that "versions prior to 2.6.28 are known to have problems parsing certain malformed HTML, and have also been reported to contain leaks, so 2.6.28 or above is highly recommended"