Python class variables

class Employee:
    raise_amount = 1.05
    num_of_empl = 0
    def __init__(self,first,last,pay):
        self.first = first
        self.last = last
        self.pay = pay
        self.email = first + '.' + last + '@company.com'
        Employee.num_of_empl +=1

    def fullname(self):
        return '{} {}'.format(self.first, self.last)

    def apply_raise(self):
        self.pay = int(self.pay * self.raise_amount)


emp_1 = Employee('Corey','Shafer', 50000)
emp_2 = Employee('Vanila','Parker', 40000)


print(emp_1.__dict__)
print(emp_1.raise_amount)
print(emp_1.pay)
# emp_1.pay *= 1.01
emp_1.apply_raise()
emp_1.raise_amount = 1.06

emp_1.apply_raise()
print(emp_1.pay)

print(emp_1.num_of_empl)