Zikui Cai

It has been explained in #16

> Hi,Thanks for your sharing.I run test.py .I encountered a problem and solved it. > > **Error**:AttributeError: 'Blade_runner' object has no attribute 'perturb_mD_img' > line 357 > > ``` >...

just delete the global statement if it's outside a function. Only inside-function global statements have effect.

The template is `tensorboard --logdir=path/to/log-directory` In our case: `tensorboard --logdir=train_dir`