# A Real-World Example Using Generators

Understand how generators can be used in real-world scenarios like delta encoding and variable byte encoding.

## We'll cover the following

Using coroutines to simplify iterators really shines when the examples are a bit more advanced. Using `co_yield`

with the `Generator`

class allows us to implement and combine small algorithms efficiently without needing boilerplate code to glue it all together. This next example will try to prove that.

## The problem

We will here go through an example of how we can use our `Generator`

class to implement a compression algorithm that can be used in search engines to compress the search index typically stored on disk.

Search engines use some variant of a data structure called an **inverted index**. It is like an index at the end of a book. Using the index, we can find all pages that contain the terms we are searching for.

Now imagine that we have a database full of recipes and that we build an inverted index for this database. Parts of this index might look something like this:

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