docs: def noexpand_parse_cfgstrs(cfgopt_strs, alias_keys=None):
      r"""
      alias_keys = None
      cfgopt_strs = 'f=2,c=[(1,2),(3,4)],d=1'
      string  = cfgopt_strs
  
      cfgopt_strs = 'f=2,c=[1,2,3,4]'
  
      CommandLine:
          python -m utool.util_gridsearch noexpand_parse_cfgstrs
  
      Example:
          >>> # ENABLE_DOCTEST
          >>> from utool.util_gridsearch import *  # NOQA
          >>> import utool as ut
          >>> cfgopt_strs = 'b=[1,2]'
          >>> alias_keys = None
          >>> cfg_combo = noexpand_parse_cfgstrs(cfgopt_strs, alias_keys)
          >>> result = ('cfg_combo = %s' % (ut.repr2(cfg_combo, nl=0),))
          >>> print(result)
          cfg_combo = {'b': [1, 2]}
      """
      import re
      import utool as ut
      # Parse dict out of a string
      #ANYTHING_NOT_BRACE = r'[^\[\]]*\]'
      #NOT_PAREN_OR_BRACE = r'[^()\[\]]*'
      if True:
          # Use a proper parser
          cfg_options = parse_cfgstr3(cfgopt_strs)
      else:
          not_paren_or_brace = '[^' + re.escape('()[]') + ']'
          end_paren_or_brace = '[' + re.escape(')]') + ']'
          nested_pat = not_paren_or_brace + '*' + end_paren_or_brace
          split_pat = r',\s*' + ut.negative_lookahead(nested_pat)
          cfgstr_options_list = re.split(split_pat, cfgopt_strs)
  
          cfg_options = ut.parse_cfgstr_list(
              cfgstr_list=cfgstr_options_list, smartcast=True, oldmode=False)
      # Remap keynames based on aliases
      if alias_keys is not None:
          # Use new standard keys and remove old aliased keys
          for key in set(alias_keys.keys()):
              if key in cfg_options:
                  cfg_options[alias_keys[key]] = cfg_options[key]
                  del cfg_options[key]
      return cfg_options