3. find_movies_by_director This function takes a list of tuples (representing movies) and a string (representing a name of a director) and returns a list containing *only* those movie tuples where the movie director is equal to the requested director. Movie tuples are of the shape (title, year, director). You can use this list for testing purposes! my_inovies = [("Blade", 1998, "Stephen Norrington"), ("Underworld", 2003, "Len Wiseman"), ("The Lost Boys", 1987, "Joel Schumacher"), ("The Hunger", 1983, "Tony Scott")] Sample calls should look like this. >>> find movies_by_director (my_movies, "Stephen Norrington") [('Blade', 1998, 'Stephen Norrington')] >>> find movies_by_director (my_movies, "Sofia Coppola") []

3. find_movies_by_director This function takes a list of tuples (representing movies) and a string (representing a name of a director) and returns a list containing only those movie tuples where the movie director is equal to the requested director. Movie tuples are of the shape (title, year, director). You can use this list for testing purposes! my_inovies = [("Blade", 1998, "Stephen Norrington"), ("Underworld", 2003, "Len Wiseman"), ("The Lost Boys", 1987, "Joel Schumacher"), ("The Hunger", 1983, "Tony Scott")] Sample calls should look like this. >>> find movies_by_director (my_movies, "Stephen Norrington") [('Blade', 1998, 'Stephen Norrington')] >>> find movies_by_director (my_movies, "Sofia Coppola") []

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Map

A map is defined as the name of a higher-order function in most of the programming languages that applies a given function to each element of a functor, such as a list, and returns a list of results in the same order. A map is also called the collection of values based on a key, i.e. a key and value pair. A map has its own set of keys. Duplicate keys are not permitted in the Map, although duplicate values are permitted. Because a Map cannot be navigated, it must be converted to a Set using the keySet() or entrySet() methods. For key-value association mapping, such as dictionaries, maps are ideal.

Question

## 3. find_movies_by_director

This function takes a list of tuples (representing movies) and a string (representing a name of a director) and returns a list containing *only* those movie tuples where the movie director is equal to the requested director.

Movie tuples are of the shape (title, year, director).

You can use this list for testing purposes:

```python
my_movies = [("Blade", 1998, "Stephen Norrington"),
("Underworld", 2003, "Len Wiseman"),
("The Lost Boys", 1987, "Joel Schumacher"),
("The Hunger", 1983, "Tony Scott")]
```

Sample calls should look like this:

```python
>>> find_movies_by_director(my_movies, "Stephen Norrington")
[('Blade', 1998, 'Stephen Norrington')]

>>> find_movies_by_director(my_movies, "Sofia Coppola")
[]
```

In the sample calls, the function `find_movies_by_director` is used to filter movies directed by "Stephen Norrington", resulting in a list containing only the movie "Blade". When searching for movies directed by "Sofia Coppola", an empty list is returned, as there are no matching results.

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