code: def search_env_paths(fname, key_list=None, verbose=None):
      r
      import utool as ut
      if key_list is None:
          key_list = [key for key in os.environ if key.find('PATH') > -1]
          print('key_list = %r' % (key_list,))
      found = ut.ddict(list)
      for key in key_list:
          dpath_list = os.environ[key].split(os.pathsep)
          for dpath in dpath_list:
              matches = ut.glob(dpath, fname)
              found[key].extend(matches)
      return dict(found)