Qiming Ding

Results 2 issues of Qiming Ding

Dear developer, when i used your function **metrics.plot_confusion_matrix** I obtain the following result, The true label looks a little ugly. How to do can I fix it? Thanks ![bug](https://user-images.githubusercontent.com/24955138/60753678-0c1eb680-a009-11e9-966a-3cf5814946b0.png)

When I used the hyperas to adjust the paraments of ANN, It returns the" TypeError: object of type 'NoneType' has no len()", I don't know the cause of this problem....