Python is a high-level, interpreted programming language that's used for a wide range of purposes similar as web development, scientific computing, data analysis, artificial intelligence, and more. It's known for its simplicity, readability, and versatility, making it a popular choice among newcomers and educated programmers likewise. Machine learning is a subfield of artificial intelligence concerned with the design and development of algorithms that can learn patterns and relationships in data. These libraries provide a variety of tools for tasks such as supervised and unsupervised learning, data pre-processing, model evaluation, and more. To get started with machine learning in Python, it's helpful to have a basic understanding of programming concepts, as well as knowledge of linear algebra, calculus, and statistics.