Get File Name

filePath = cmds.file(q=True, sn=True)
print filePath
D:/__My Model for Game/GameA/Maya/Dada/scenes/Dada_v12.ma

fileName = os.path.basename(filepath)
print fileName
Dada_v12.ma

fileNameNoExe, extension = os.path.splitext(fileName)
print fileNameNoExe
Dada_v12