type

In Python, the type soft keyword allows you to explicitly define generic type alias in the context of type hints or type annotations.

Python type Keyword Examples

Here’s a quick example demonstrating how to use the type keyword to define a type alias for either a list or set:

Python 
type ListOrSet[T] = list[T] | set[T]


def function(values: ListOrSet):
    pass

Python type Keyword Use Cases

Defining generic type aliases.

The Ultimate Guide to Python Type Checking

Tutorial

Python Type Checking (Guide)

In this guide, you'll look at Python type checking. Traditionally, types have been handled by the Python interpreter in a flexible but implicit way. Recent versions of Python allow you to specify explicit type hints that can be used by different tools to help you develop your code more efficiently.

intermediate best-practices

For additional information on related topics, take a look at the following resources:

By Leodanis Pozo Ramos • Updated May 23, 2025
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