This class isn't very useful, because it can only represent one particular flight. We need to make the flight number configurable at the point a Flight is created. To do that we need to write an initializer method.
If provided, the initializer method is called as part of the process of creating a new object when we call the constructor. The initializer method must be called __init__() delimited by the double underscores used for Python runtime machinery. Like all other instance methods, the first argument to __init__() must be self.
In this case, we also pass a second formal argument to __init__() which is the flight number:
class Flight:
def __init__(self, number):
self._number = number
def number(self):
return self._number
The initializer should not return anything – it simply modifies the object referred to by self.
If you...
