In python, you can use the garbage collector’s book-keeping to print out the currently resident Tensors. Here’s a snippet that shows all the currently allocated Tensors:
# prints currently alive Tensors and Variables
import torch
import gc
for obj in gc.get_objects():
    try:
        if torch.is_tensor(obj) or (hasattr(obj, 'data') and torch.is_tensor(obj.data)):
            print(type(obj), obj.size())
    except:
        pass

Edited on April 7th, 2019 to add a try/except