plt.pause in neural style for interactive plots

Author: chsasank

advanced_source/neural_style_tutorial.py

@@ -233,6 +233,7 @@ def imshow(tensor, title=None):
     plt.imshow(image)
     if title is not None:
         plt.title(title)
+    plt.pause(0.001) # pause a bit so that plots are updated
 
 
 plt.figure()