For this assignment, we'll be working with a Concert domain.
We have three models: Band
, Concert
, and Venue
.
For our purposes, a Band
has many Concerts
, a Venue
has many Concerts
s, and a Concert
belongs to a Band
and to a Venue
.
Band
- Venue
is a many to many relationship.
Note: You should draw your domain on paper or on a whiteboard before you start coding. Remember to identify a single source of truth for your data.
- Classes and Instances
- Class and Instance Methods
- Variable Scope
- Object Relationships
- lists and list Methods
To get started, run pipenv install; pipenv shell
while inside of this
directory.
Build out all of the methods listed in the deliverables. The methods are listed in a suggested order, but you can feel free to tackle the ones you think are easiest. Be careful: some of the later methods rely on earlier ones.
Remember! This challenge has pytest
tests available to you. Run
pytest
at any time from within your virtual environment.
We've provided you with another tool that you can use to test your code. To use
it, run python debug.py
from the command line. This will start a ipdb
session with your classes defined. You can test out the methods that you write
here. You can add code to the debug.py
file to define variables and create
sample instances of your objects.
Writing error-free code is more important than completing all of the deliverables listed - prioritize writing methods that work over writing more methods that don't work. You should test your code in the console as you write.
Similarly, messy code that works is better than clean code that doesn't. First, prioritize getting things working. Then, if there is time at the end, refactor your code to adhere to best practices. When you encounter duplicated logic, extract it into a shared helper method.
Before you submit! Save and run your code to verify that it works as you expect. If you have any methods that are not working yet, feel free to leave comments describing your progress.
Write the following methods in the classes in the files provided. Feel free to build out any helper methods if needed.
Note: all setters should raise
Exception
if their criteria are not met.
- Band
__init__(name, hometown)
- should initialize with a name (string) and hometown (string)
- Band property
name
- should return the
Band
's name - must be a string of greater than zero characters
- should return the
- Band property
hometown
- should return the
Band
's hometown - must be a string of greater than zero characters
- should return the
- Venue
__init__(title, city)
- should initialize with a title (string) and city (string)
- Venue property
title
- should return the title of the venue
- must be a string of greater than zero characters
- Venue property
city
- should return the city of the venue
- must be a string of greater than zero characters
- Concert
__init__(self, date, band, venue)
- should initialize with a date (string), band, and venue
- date must be a string of greater than zero characters
- Concert
band
- should return the
Band
instance for this concert
- should return the
- Concert
venue
- should return the
Venue
instance for this concert
- should return the
- Venue
concerts
- returns a list of all the concerts for the venue
- Venue
bands
- returns a list of all the bands for the venue
- Band property
concerts
- should return a list of all the concerts that the band has played in
- Concert
hometown_show
- returns
true
if the concert is in the band's hometown,false
if it is not
- returns
- Concert
introduction
- returns a string with the band's introduction for this concert
- an introduction is in the form:
"Hello {insert city name here}!!!!!, we are {insert band name here} and we're from {insert hometown here}"
- Band
play_in_venue(venue, date)
- takes a venue and date (as a string) as arguments, and creates a new concert for the band in that venue on that date
- Band
all_introductions
- returns a list of strings representing all the introductions for this band
- each introduction is in the form
"Hello {insert city name here}!!!!!, we are {insert band name here} and we're from {insert hometown here}"
- Venue
concert_on(date)
- takes a date (string) as argument
- finds and returns the first concert on that date at that venue
- if there is no concert on that date at that venue, returns
None