请问这段代码是什么意思PLAYER_STAT_DESC = [ {"key":"name", "label": "Perfomance Analysis", "compare_fn": uncomparable}, {"key":"setWins", "label": "Set 盘数"}, {"key":"aces", "label": "Aces"}, {"key":"fstServeSuccRate", "label": "1st Serve 一发进球率"}, {"key":"fstServeWinRate", "label": "1st Serve 一发赢球率"}, {"key":"fstServeWinnerRate", "label": "1st Serve Points Winner 一发直得率"}, {"key":"sndServeWinRate", "label": "2nd Serve Points Won 二发赢球率"}, {"key":"serveGames", "label": "Service Games Played 发球局数"}, {"key":"doubleFaults", "label": "Double Faults", "compare_fn": less_better}, {"key":"netWinRate", "label": "Net Points Won网前得分",}, {"key":"brkPtConvtRate", "label": "Break Points Converted 破发点转化率"}, {"key":"unforcedErrors", "label": "Unforced Error 非受迫性失误", "compare_fn":less_better}, {"key":"forcedErrors", "label": "Forced Error 受迫性失误", "compare_fn": less_better}, {"key":"winners", "label": "Winners 制胜分"}, {"key":"pointWinRate", "label": "Total Points Won 总得分数"}, ]

这段代码定义了一个名为PLAYER_STAT_DESC的列表，其中包含了多个字典元素。每个字典元素表示一个球员的统计数据，并包含以下键值对：

- "key"：表示统计数据的键名。
- "label"：表示统计数据的标签或名称。
- "compare_fn"：用于比较统计数据的函数（可选）。这个函数用于确定哪些统计数据更好或更差。
- 其他键值对表示其他与统计数据相关的信息。

该代码段主要用于定义球员统计数据的描述信息，以便在后续的代码中使用。