文件名='data_％d.dat'％（i，）
打印文件名

I'm trying to save a lot of data that needs to be separated in to different files like so data_1.dat data_2.dat data_3.dat data_4.dat

how do I implement this in python?

for i in range(10):
    filename = 'data_%d.dat'%(i,)
    print filename