What is the equivalent of a Python docstring in Ruby?

Question

In Python, you can access an object's docstring by using obj.__doc__. What is the equivalent action in Ruby?

Answer 1

Ruby does not have a Python __doc__ equivalent. They often use Rdoc Format for documentation, for example:

# For example, a square or circle.
class Shape
  # A horizontal position.
  def x
  end

  # A vertical position.
  def y
  end
end