What are the new features in Python 3.10 for advanced type checking?

What are the new features in Python 3.10 for advanced type checking?

Python 3.10 introduced several enhancements for type checking, including the new syntax for union types using the | operator, and the ability to use type guards.

Can you explain how to use the new union type syntax?

Sure! Instead of using 'Union[X, Y]', you can now write 'X | Y'. This makes the code cleaner and easier to read.

What are type guards and how do they work?

Type guards are a way to narrow down the type of a variable within a conditional block. For example, you can define a function that checks the type and returns a specific type based on that check.

Can you give me an example of a type guard?

Absolutely! Here's a simple example: if you have a function that checks if an input is a string, you can use a type guard to ensure that the variable is treated as a string within that block.