class Person:
    def __init__(self, name, age, height, weight, gender):
        if not isinstance(age, int) or not isinstance(height, float) or not isinstance(weight, float):
            raise(TypeError, "Age must be an int, height and weight must be a float")

        self.name = name
        self.age = age
        self.height = height
        self.weight = weight
        self.gender = gender
        self.initials = ".".join((name[0], name[name.index(" ") + 1]))

class Employee(Person):
    def setManager(self, manager):
        self.manager = manager

class Manager(Person):
    def addEmployee(self, employee):
        try:
          self.employees
        except AttributeError:
          self.employees = []

        self.employees.append(employee)

alex = Manager("Alex Hunt", "Asdf", 170.0, 77.3, "Male")
kyle = Employee("Kyle Ward", 12, 120.0, 22.5, "Male")

alex.addEmployee(kyle)

print(alex.employees)