初学python，想利用编程读取txt文本并生成excel，记录一下。
txt数据源截取如下（将近2W行数据）：
00:00:06 RADV Voice Signal:-63dBm
00:00:09 RADD DATA Signal:-65dBm
00:00:12 RADV Voice Signal:-61dBm
00:00:14 RADV Voice Signal:-63dBm
00:00:22 RADV Voice Signal:-65dBm
00:00:27 RADD DATA Signal:-67dBm
00:00:32 RADV Voice Signal:-67dBm
00:00:3
