Exploring the Nested Lists with a Generator Function

How can we extract elements from nested lists using a generator function?

Let's delve into the concept of generator functions and nested lists to uncover an efficient way of retrieving elements.

Answer:

The `nested()` function is a generator function that takes a list of lists as an argument and returns all the elements from the nested lists in order.

The generator function `nested()` takes a list of lists as an argument and returns all the elements from the nested lists in order. Here is how you can implement the function:

```python def nested(lst): for sublist in lst: for element in sublist: yield element ```

Let's break down the implementation step-by-step:

1. We define the generator function `nested()` that takes a list of lists, `lst`, as the argument.
2. We use a `for` loop to iterate over each sublist in the input list `lst`.
3. Within the loop, we use another `for` loop to iterate over each element in the current sublist.
4. We use the `yield` keyword to generate and return each element from the nested lists one at a time. This allows us to create a generator object that can be iterated over.
5. The generator function continues to yield elements until there are no more elements left in the nested lists.

To use the `nested()` function and retrieve all the elements from the nested lists, you can do the following:

```python nested_list = [[1], [2, 3], [4, 5, 6]] result = list(nested(nested_list)) print(result) ```

Output:

```[1, 2, 3, 4, 5, 6]```

In conclusion, the `nested()` function is a generator function that takes a list of lists as an argument and returns all the elements from the nested lists in order.