map in dataframe - pyspark

Question

Here I'm passing a dataframe (CV_data) to add lable points for Descision Tree

def labelData(data):
    # label: row[end], features: row[0:end-1]
    return data.map(lambda row: LabeledPoint(row[-1], row[:-1]))

m = labelData(CV_data)

Its giving me error

AttributeError: 'DataFrame' object has no attribute 'map'

Help needed