docs: def compare_versions(ver1='', oper='==', ver2=''):
      '''
      Compare software package versions
  
      Args:
          ver1 (str): A software version to compare
          oper (str): The operand to use to compare
          ver2 (str): A software version to compare
  
      Returns:
          bool: True if the comparison is valid, otherwise False
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' pkg.compare_versions 1.2 >= 1.3
      '''
      if not ver1:
          raise SaltInvocationError('compare_version, ver1 is blank')
      if not ver2:
          raise SaltInvocationError('compare_version, ver2 is blank')
  
      # Support version being the special meaning of 'latest'
      if ver1 == 'latest':
          ver1 = six.text_type(sys.maxsize)
      if ver2 == 'latest':
          ver2 = six.text_type(sys.maxsize)
      # Support version being the special meaning of 'Not Found'
      if ver1 == 'Not Found':
          ver1 = '0.0.0.0.0'
      if ver2 == 'Not Found':
          ver2 = '0.0.0.0.0'
  
      return salt.utils.versions.compare(ver1, oper, ver2, ignore_epoch=True)