https://www.youtube.com/watch?v=K8L6KVGG-7o https://www.youtube.com/watch?v=f79MRyMsjrQ&list=PLTjRvDozrdlxj5wgH4qkvwSOdHLOCx10f https://www.datacamp.com/community/tutorials/python-regular-expression-tutorial
https://www.tutorialspoint.com/python/python_reg_expressions https://www.youtube.com/watch?v=f79MRyMsjrQ&list=PLTjRvDozrdlxj5wgH4qkvwSOdHLOCx10f