Lists are defined as ordered collections within Python, functioning as the primary data structure for storing and manipulating sequences of heterogeneous objects. The core theoretical mechanism involves zero-based indexing and dynamic membership verification via the 'in' operator, establishing a rule-based framework for accessing, mutating, and removing elements based on positional relative locations. This concept represents a fundamental construct in computer science regarding array-like structures, where the preservation of element order and support for duplication define its specific utility within the domain of programming language theory.
Prerequisite chain context: requires Python List Indexing and Slicing.