What are the best practices for using closures in Python?

What are the best practices for using closures in Python?

When using closures in Python, it's important to ensure that the inner function has access to the variables from the outer function. Avoid using mutable default arguments to prevent unexpected behavior.

Can you give me an example of a closure?

Sure! Here's a simple example:

def outer_function(x):
    def inner_function(y):
        return x + y
    return inner_function

closure = outer_function(10)
print(closure(5))  # Output: 15

What should I avoid when using closures?

Avoid creating closures that capture mutable objects, as changes to those objects can lead to unexpected results. Also, be cautious with variable scope.

Are there any performance considerations?

Yes, closures can introduce some overhead due to the additional function scope. However, they can also lead to cleaner and more maintainable code.