scala> val res=data.map(lambda x:x.split(",")).map(lambda x:x[0])
<console>:1: error: ')' expected but '(' found.
val res=data.map(lambda x:x.split(",")).map(lambda x:x[0])
^
<console>:1: error: ';' expected but ')' found.
val res=data.map(lambda x:x.split(",")).map(lambda x:x[0])
^
感觉哪里都没出错啊友友们,怎么回事啊