Problem B
Music Album

Write a class called MusicAlbum that has the attributes: “band”, “title” and “year”.

The class should have $3$ methods:

• __init__(band, title, year): Should accept $3$ parmeters, a band name, album title, and a year. By default the band name should be “unknown band”, title by default should be “unknown” and the year should be “unknown year” by default.

• set_album(band, title, year): Should overwrite attributes in the class. If a field is not supplied in the parameter, the default is the same as in the constructor.

• __str__(): Should return a string representation of the album, see output example below.

Note: It can happen that you might have to overwrite existing data with a default value, when calling set_album.

Note: You should not submit the main program as part of your solution, only the file that contains the class MusicAlbum.

The following is an example main program. This example is also included in the supplied “main.py” file:

album = MusicAlbum()
print(album)

album.set_album("Talking Heads", "Remain in Light", 1980)
print(album)

album.set_album("AC/DC", "Back in Black")
print(album)

album_beatles = MusicAlbum("The Beatles", "Abbey Road")
album_london_calling = MusicAlbum(title="London Calling", year=1979)
album_beyonce = MusicAlbum(band="Beyonce", year=2016)

print(album_beatles)
print(album_london_calling)
print(album_beyonce)

Output

The following is the corresponding output for the sample program given above:

Album unknown by unknown band, released in unknown year.
Album Remain in Light by Talking Heads, released in 1980.
Album Back in Black by AC/DC, released in unknown year.
Album Abbey Road by The Beatles, released in unknown year.
Album London Calling by unknown band, released in 1979.
Album unknown by Beyonce, released in 2016.