code: def get_region(region_name, **kw_params):
      
      for region in regions(**kw_params):
          if region.name == region_name:
              return region
      return None
docs: Find and return a :class:`boto.regioninfo.RegionInfo` object
      given a region name.
  
      :type: str
      :param: The name of the region.
  
      :rtype: :class:`boto.regioninfo.RegionInfo`
      :return: The RegionInfo object for the given region or None if
               an invalid region name is provided.