import numpy as np
import chainer
import chainer.links as L
from chainer import Chain, Variable
from chainer import datasets

class SOM(chain):
    pass

def main():
    pass

if __name__ == '__main__':
    main()

import numpy as np
import chainer
import chainer.links as L
from chainer import Chain, Variable
from chainer import datasets

class SOM(Chain):
    pass

def main():
    pass

if __name__ == '__main__':
    main()

update train.py