What are some examples of type checking in Python?

What are some examples of type checking in Python?

In Python, type checking can be done using the built-in type() function, isinstance(), and type hints. For example, you can check if a variable is an integer using isinstance(x, int).

Can you show me a code snippet using isinstance()?

Sure! Here's a simple example:

x = 10
if isinstance(x, int):
    print('x is an integer')
else:
    print('x is not an integer')

What about using type hints?

Type hints can be used to indicate the expected data types of function parameters and return values. For example:

def add(a: int, b: int) -> int:
    return a + b

Are there any libraries that help with type checking?

Yes, libraries like mypy can be used for static type checking in Python. You can annotate your code with type hints and then run mypy to check for type errors.