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 Concertss, 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 while inside of this directory. Then run pipenv shell to jump into the shell.

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 code 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 properties and methods in the classes in the files provided. Feel free to build out any helper methods if needed.

• Band __init__(self, name, hometown)
  • Band is initialized with a name and hometown
• Band property name
  • Returns the band's name
  • Names must be of type str
  • Must be greater than zero characters
  • Should be able to change after the band is instantiated
• Band property hometown
  • Returns the band's hometown
  • Hometowns must be of type str
  • Must be greater than zero characters
  • Should not be able to change after the band is instantiated
  • hint: hasattr()

• Venue __init__(self, name, city)
  • Venue is initialized with a name and city
• Venue property name
  • Returns the venue's name
  • names must be of type str
  • Must be greater than zero characters
  • Should be able to change after the venue is instantiated
• Venue property city
  • Returns the venue's city
  • Cities must be of type str
  • Must be greater than zero characters
  • Should be able to change after the venue is instantiated

• Concert __init__(self, date, band, venue)
  • Concert is initialized with a date, a Band instance, and Venue instance
• Concert property date
  • Returns the concert's date
  • Dates must be of type str
  • Must be greater than zero characters
  • Should be able to change after the concert is instantiated

• Concert band
  • Returns the Band instance for this concert
  • Must be of type Band
  • Should be able to change after the concert is instantiated
• Concert venue
  • Returns the Venue instance for this concert
  • Must be of type Venue
  • Should be able to change after the concert is instantiated

• Venue concerts()
  • Returns a list of all the concerts for the venue
  • Concerts must be of type Concert
  • Returns None if there are no concerts for that venue
• Venue bands()
  • Returns a unique list of all the bands for the venue
  • Bands must be of type Band
  • Returns None if there are no concerts for that venue

• Band property concerts()
  • Returns a list of all the concerts that the band has played in
  • Concerts must be of type Concert
  • Returns None if there are no concerts for that band
• Band property venues()
  • Returns a unique list of all the venues that the band has played in
  • Venues must be of type Venue
  • Returns None if there are no concerts for that band

• Concert hometown_show()
  • Returns True if the concert is in the band's hometown
  • Returns False if it is not
• 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 instance and a date as arguments
  • Creates and returns a new concert object 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}"
  • Returns None if there are no concerts

• Venue concert_on(date)
  • Takes a date (string) as argument
  • Finds and returns the first concert object on that date at that venue
  • Returns None if there is no concert on that date at that venue
  • Uncomment lines 136-146 in the venue_test file

• First, comment out the following lines
  • band_test.py
    • lines 26-27, 39-40, 60-62, 65-66, 82-83
  • concert_test.py
    • lines 27-28, 43-44, 65-66, and 100-101
  • venue_test.py
    • lines 24-25, 37-38, 60-61, and 73-74
• Then, uncomment the following lines in the test files
  • band_test.py
    • lines 30-31, 43-44, 69-70, 73-74, and 86-87
  • concert_test.py
    • lines 31-32, 47-48, 71-72, and 106-107
  • venue_test.py
    • lines 28-29, 41-42, 64-65, and 77-78