Dataloaders Zip

dataloaders = zip(labeled_trainloader, [None] * len(labeled_trainloader))

What is this line of code means? I know to zip 2 dataloaders using zip. But why are they adding the length of the dataloader .

Answer

[None] * len(labeled_trainloader) will make a list of None values the same length as labeled_trainloader. For example, [None] * 3 results in [None, None, None].

The zip expression will result in each object in labeled_trainloader being paired with None.

labeled_trainloader = [1, 2, 3]
dataloaders = zip(labeled_trainloader, [None] * len(labeled_trainloader))

print(list(dataloaders))

Output:

[(1, None), (2, None), (3, None)]