code: def rename_regions(self, regions):
          
  
          if type(regions) is list:
              regions = {old: new for old, new in
                         zip(self.get_regions(), regions)}
  
          for df in self.get_DataFrame(data=True):
              df.rename(index=regions, columns=regions, inplace=True)
  
          try:
              for ext in self.get_extensions(data=True):
                  for df in ext.get_DataFrame(data=True):
                      df.rename(index=regions, columns=regions, inplace=True)
          except:
              pass
  
          self.meta._add_modify("Changed country names")
          return self
docs: Sets new names for the regions
  
          Parameters
          ----------
          regions : list or dict
              In case of dict: {'old_name' :  'new_name'} with a
                  entry for each old_name which should be renamed
              In case of list: List of new names in order and complete
                  without repetition