How to "include" Instance and Class methods into a class in ruby

instance-class-include.rb

module Lib
  # this loads our class methods when called by "include"
  def self.included(base)
    base.extend(ClassMethods)
    # code here will run when lib is imported, in Lib module context
    puts "Lib context: #{self.to_s}"
    # this calls the lib_init method to run any class set up code
    base.send(:lib_init)
  end

  module ClassMethods
    def lib_init
      # code here will run when library is imported, in class context
      puts "Class context: #{self.to_s}"
    end
    def class_method
      puts "class method here"
    end
  end

  def instance_method
    puts "instance method here"
  end
end

class MyClass
  puts "Including Lib now.."
  include Lib
end

# Including Lib now..
# Lib context: Lib
# Class context: MyClass

MyClass.class_method
# class method here
myclass = MyClass.new
myclass.instance_method
# "instance method here"