No saved *.png in checkpoint in dcgan.cpp

In the README file of "DCGAN Example with the PyTorch C++ Frontend" it says that:

The training script periodically generates image samples. Use the display_samples.py script situated in this folder to generate a plot image. For example:

But the dcgan.cpp file just saves the model in *.pt format, doesnt save any picture. Then, the command stated in the README:

$ python display_samples.py -i dcgan-sample-10.png
Saved out.png

Gives an error as dcgan-sample-10.png doesnt exist