AttributeError: ‘module’ object has no attribute ‘main’ for tf.app.run()

You either need a “def main(args)” function in your file:

import numpy as np
import tensorflow as tf    
flags = tf.app.flags
FLAGS = flags.FLAGS    
import tensorvision.train as train
import tensorvision.utils as utils    

def main(args):
    flags.DEFINE_string('name', None,
                        'Append a name Tag to run.')

    flags.DEFINE_string('hypes', 'hypes/medseg.json',
                        'File storing model parameters.')    
if __name__ == '__main__':
    tf.app.run()

or tf.app.run() can call an external function

tf.app.run(my_func)