isinstance3

Isinstance3 is a Python library designed to provide a more efficient and flexible alternative to the built-in isinstance function. The primary goal of isinstance3 is to improve performance by reducing the overhead associated with type checking, especially in scenarios where multiple types need to be checked.

The library introduces a new function, isinstance3, which can be used similarly to isinstance. However, it is optimized for handling complex type hierarchies and multiple type checks more efficiently. This is achieved through the use of advanced data structures and algorithms that minimize the number of comparisons needed.

Isinstance3 also supports custom type checking through the use of callable objects. This allows users to define their own type checking logic, providing greater flexibility in how types are validated.

One of the key features of isinstance3 is its ability to handle abstract base classes (ABCs) more effectively. The library includes optimizations for checking against ABCs, which are commonly used in Python for defining interfaces and protocols.

Isinstance3 is designed to be a drop-in replacement for isinstance, meaning that existing code can be easily migrated to use the new library with minimal changes. This makes it a practical choice for developers looking to improve the performance of their type checking without needing to rewrite significant portions of their codebase.

The library is open-source and available on popular Python package repositories, making it accessible to a wide range of developers. It is well-documented and includes a suite of tests to ensure reliability and correctness.