Instructions

Conda Airlines is the programming-world's biggest airline, with over 10,000 flights a day!

They are currently assigning all seats to passengers by hand; this will need to be automated.

They have asked you to create software to automate passenger seat assignments. They require your software to be memory efficient and performant.

1. Generate seat letters

Conda wants to generate seat letters for their airplanes. An airplane is made of rows of seats. Each row has 4 seats. The seats in each row are always named A, B, C, and D. The first seat in the row is A, the second seat in the row is B, and so on. After reaching D, it should start again with A.

Implement a function generate_seat_letters(<number>) that accepts an int that holds how many seat letters to be generated. The function should then return an iterable of seat letters.

2. Generate seats

Conda wants a system that can generate a given number of seats for their airplanes. Each airplane has 4 seats in each row. The rows are defined using numbers, starting from 1 and going up. The seats should be ordered, like: 1A, 1B, 1C, 1D, 2A, 2B, 2C, 2D, 3A, 3B, 3C, 3D, ...

Here is an example:

Many airlines do not have row number 13 on their flights, due to superstition amongst passengers. Conda Airlines also follows this convention, so make sure you don't generate seats for row number 13.

Implement a function generate_seats(<number>) that accepts an int that holds how many seats to be generated. The function should then return an iterable of seats given.

3. Assign seats to passengers

Now that you have a function that generates seats, you can use it to assign seats to passengers.

Implement a function assign_seats(<passengers>) that accepts a list of passenger names. The function should then return a dictionary of passenger as key, and seat_number as value.

4. Ticket codes

Conda Airlines would like to have a unique code for each ticket. Since they are a big airline, they have a lot of flights. This means that there are multiple flights with the same seat number. They want you to create a system that formulates a unique ticket that is a 12 character long string.

This code begins with the assigned_seat followed by the flight_id. The rest of the code is filled with 0s.

Implement a function generate_codes(<seat_numbers>, <flight_id>) that accepts a list of seat_numbers and a string with the flight number. The function should then return a generator that yields a ticket_number.