Explain the concept of type identity and its role in data typing.

Type identity is the uniqueness of a data type within a type system. It determines when two types are considered the same. In statically typed programming languages, such as Python, type identity is important for checking type compatibility and preventing errors.

For example, in Python, two classes are considered the same type if they have the same identity, meaning they refer to the same class object in memory. Even if two classes have the same structure but are defined separately, they are considered different types.

This helps the interpreter and developer understand which objects can be used interchangeably and which cannot, ensuring type safety and correct program operation.