code: def get_mod_site_name(mod_condition):
      
      if mod_condition.residue is None:
          mod_str = abbrevs[mod_condition.mod_type]
      else:
          mod_str = mod_condition.residue
      mod_pos = mod_condition.position if \
          mod_condition.position is not None else ''
      name = ('%s%s' % (mod_str, mod_pos))
      return name
docs: Return site names for a modification.