class myClass:
    def __init__(self):
        self.A = 1
        self.B = "A"
    def GetNum(self):
        return self.A
    def GetLetter(self):
        return self.B


>>> x = SimpleClass.myClass()
>>> x.A
1
>>> x.B
'A'
>>> x.GetLetter()
'A'
>>> x.C = '+'
>>> x.C
'+'
>>> x.ShowOperator = lambda : '+'
>>> x.ShowOperator()
'+'
>>> x.GetLetter = lambda : 'Q'
>>> x.GetLetter()
'Q'
>>> 

class Foo
  // getter
  def bar()
    return @bar // return instance variable "bar"
  end
 
  // setter, this also is a method.
  def bar=(new_value)
    @bar = new_value
  end
end
 
- or -
 
class Foo
  attr_accessor :bar
end
 
a = Foo.new
a.bar = 3
a.bar //=> 3

class Post < ActiveRecord::Base
  has_many :comments
end