Write `flight.py` module

[Dhud6]

Write the models/flight.py module. The module should contain a Flight class. Unlike the Route class from the route module, which represents a generic route that can be flown, the Flight class represents a flight that is flown by an aircraft. Check for all constraints in the constructor. If a bad type is given, raise a TypeError; if a bad value is given (e.g. a negative flight number), raise a ValueError. All tests should test for both legal and illegal values (to verify that the class works as intended and catches errors). If you find yourself repeating code across unit tests, consider abstracting the repeated code into a pytest fixture.

with the following data members:

• The flight number (as a unique integer greater than 0, provided by the scheduler)
• The time the flight was scheduled (as an int greater than 0)
• The aircraft flying the route (Aircraft from the models.aircraft module)
• The route being flown (Route from the models.route module)
• The passengers on the flight (Passenger from the models.passenger module)

you should test:

• the constructor correctly initializes all fields
• the constructor raises type errors for invalid types for each field
• the constructor raises value errors for invalid value ranges for each field

[Dhud6]

Initial update to flight.py. I added the basic setup for the class. This will probably need to be updated in the future once the other modules are created. Still need to create the pytest for this module.

[Dhud6]

Updated flight.py. Started creating the pytest file for it.