class arguements

[astral_travel]

I've noticed - sometimes there is code like this:

class Person:
  def __init__(self, name, age):
    self.name = name
    self.age = age

p1 = Person("John", 36)

print(p1.name)
print(p1.age) 

where class definition is left empty (class Person),

and sometimes code like this:

 	
class Employee(object):

where the class is given an arguement,

what is the difference, when each of the variation is being used ?