What is lazy loading in Python and how can I implement it?

What is lazy loading in Python and how can I implement it?

Lazy loading is a design pattern that delays the initialization of an object until it's needed. In Python, you can implement it using properties or generators.

Can you show me an example of lazy loading with a class?

Sure! Here's a simple example:

class LazyLoader:
    def __init__(self):
        self._data = None

    @property
    def data(self):
        if self._data is None:
            print('Loading data...')
            self._data = self.load_data()
        return self._data

    def load_data(self):
        return [1, 2, 3, 4, 5]

In this example, the data is only loaded when you access the data property.

What are the benefits of using lazy loading?

The benefits include improved performance, reduced memory usage, and faster initial load times since resources are only loaded when necessary.

Are there any downsides to lazy loading?

Yes, potential downsides include increased complexity in code and possible delays when accessing data for the first time.