code: def couple(f, g):
      r
      def coupled(*args, **kwargs):
          return f(*args, **kwargs), g(*args, **kwargs)
      return coupled
docs: r"""
      Compose a function thate returns two arguments.
  
      Given a pair of functions that take the same arguments, return a
      single function that returns a pair consisting of the return values
      of each function.
  
      Notes
      -----
      Equivalent to::
  
          lambda f, g: lambda *args, **kwargs: (f(*args, **kwargs),
                                                g(*args, **kwargs))
  
      Examples
      --------
      >>> f = lambda x: 2*x**3
      >>> df = lambda x: 6*x**2
      >>> f_new = couple(f, df)
      >>> f_new(5)
      (250, 150)