How does the Python typing module ensure compatibility across versions?

How does the Python typing module ensure compatibility across different Python versions?

The Python typing module provides a standard way to specify types, and it aims to maintain backward compatibility. This means that type hints introduced in newer versions are designed to work with older versions as much as possible.

Can you give me an example of how to use type hints in Python?

Sure! Here's a simple example:

def greet(name: str) -> str:
    return f'Hello, {name}!'

In this function, name is expected to be a string, and the function returns a string.

What are some common issues with type hinting in older versions?

Common issues include missing support for certain types, like Optional or Union, in older versions. This can lead to confusion when trying to use type hints that aren't recognized.

Is there a way to check type compatibility in my code?

Yes, you can use tools like mypy to check type compatibility in your code. It analyzes your code and reports any type errors based on the hints you've provided.