Python Data Analysis & Comparison

I require a skilled Python developer who is proficient in data analysis and can automate repetitive tasks. This project specifically pertains to creating a script that will effectively compare two files, 'file1' and 'file2'. The purpose of this is to generate a list detailing the elements of 'file1' that are absent from 'file2'. The ideal freelancer should be proficient in these areas:
- Understanding of Python and its libraries for data analysis
- Experience in creating automation scripts for dealing with large datasets
- Familiarity with file comparison and report generation in Python.