You could use this as a starter code (I’ve skipped the loading of the state_dict etc.):

image = Image.open(YOUR_PATH)
x = transform_test(image)
# If you are using PyTorch < 0.4.0
x = Variable(x, volatile=True)
# Else you would use: with torch.no_grad():
model.eval()
output = model(x)
...