树型数据表-->树形字典
table tree：
  array(
   (""name"":""基金收益(%)"",""value"":-3.2,""group"":""""),
   (""name"":""分解1"",""group"":""基金收益(%)""),
   (""name"":""风格收益"",""value"":8,""group"":""基金收益(%)\\分解1""),
   (""name"":""基准收益"",""value"":3.2,""group"":""基金收益(%)\\分解1\\风格收益""),
   (""name"":""风格alpha"",""value"":3.8,""group"":""基金收益(%)\\分解1\\风格收益""),
   (""name"":""风格alphal"",""value"":9.199999999999999,""group"":""基金收益(%)\\分解1""),
   (""name"":""分解2"",""group"":""基金收益(%)""),
   (""name"":""超额"",""value"":2.9,""group"":""基金收益(%)\\分解2""),
   (""name"":""基准"",""value"":2.9,""group"":""基金收益(%)\\分解2""));
dict tree:
  array((""name"":""基金收益(%)"",""value"":-3.2,
     ""children"":(
        (
        ""name"":""分解1"",
        ""children"":(
         (""name"":""风格收益"",""value"":8,
         ""children"":(
           (""name"":""基准收益"",""value"":3.2),
           (""name"":""风格alpha"",""value"":3.8)
               )
         ),
         (""name"":""风格alphal"",""value"":9.199999999999999)
              ),
        ),
        (""name"":""分解2"",
        ""children"":(
           (""name"":""超额"",""value"":2.9),
           (""name"":""基准"",""value"":2.9)),
              )
        ),
   ))