# cf.Units.equals

`Units.``equals`(other, rtol=None, atol=None)

  Return True if and only if numeric values in one unit are convertible to numeric values in the other unit and their conversion is a scale factor of 1.

  See also

  `equivalent`

  Parameters: | other : Units The other units.
  Returns: | out : bool True if the units are equal, False otherwise.
  Examples: |

      >>> u = Units('km')
      >>> v = Units('1000m')
      >>> w = Units('100000m')
      >>> u.equals(v)
      True
      >>> u.equals(w)
      False

      >>> u = Units('m s-1')
      >>> m = Units('m')
      >>> s = Units('s')
      >>> u.equals(m)
      False
      >>> u.equals(m/s)
      True
      >>> (m/s).equals(u)
      True

  Undefined units are considered equal:

      >>> u = Units()
      >>> v = Units()
      >>> u.equals(v)
      True